{"id":29868,"date":"2023-11-03T12:08:20","date_gmt":"2023-11-03T04:08:20","guid":{"rendered":"https:\/\/orapiasia.com\/?p=29868"},"modified":"2024-01-25T12:55:56","modified_gmt":"2024-01-25T04:55:56","slug":"crevice-corrosion-an-in-depth-analysis","status":"publish","type":"post","link":"https:\/\/orapiasia.com\/zh\/crevice-corrosion-an-in-depth-analysis\/","title":{"rendered":"Crevice Corrosion: An In-Depth Analysis"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"29868\" class=\"elementor elementor-29868\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-52d445a3 e-flex e-con-boxed e-con e-parent\" data-id=\"52d445a3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7ff0d5cd elementor-widget elementor-widget-text-editor\" data-id=\"7ff0d5cd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7dac893 e-flex e-con-boxed e-con e-parent\" data-id=\"7dac893\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a563a4c elementor-widget elementor-widget-image\" data-id=\"a563a4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1020\" height=\"480\" src=\"https:\/\/orapiasia.com\/wp-content\/uploads\/crevice-corrosion-causes-1-1024x482.jpeg\" class=\"attachment-large size-large wp-image-29878\" alt=\"crevice corrosion causes\" srcset=\"https:\/\/orapiasia.com\/wp-content\/uploads\/\/crevice-corrosion-causes-1-1024x482.jpeg 1024w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/crevice-corrosion-causes-1-300x141.jpeg 300w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/crevice-corrosion-causes-1-768x362.jpeg 768w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/crevice-corrosion-causes-1-510x240.jpeg 510w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/crevice-corrosion-causes-1.jpeg 1200w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f84effa elementor-widget elementor-widget-text-editor\" data-id=\"f84effa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Numerous types of corrosion manifest visibly through extensive deterioration and discolouration. However, crevice corrosion initiates from a minute surface area and swiftly expands out of view within the metal, concealed beneath insulation or within tanks and vessels, resulting in potential component or structural failure without adequate warning. Thankfully, the origins of crevice corrosion are thoroughly understood. This guide not only explains the factors that promote this particular corrosion but also offers preventive measures, making risk mitigation a straightforward process.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-467abd0 e-flex e-con-boxed e-con e-parent\" data-id=\"467abd0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-81f4fbe elementor-widget elementor-widget-text-editor\" data-id=\"81f4fbe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Also read:<br \/><br \/><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e0523f elementor-widget elementor-widget-text-editor\" data-id=\"3e0523f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"text-decoration: underline;\"><a href=\"https:\/\/orapiasia.com\/zh\/everything-you-need-to-know-about-galvanic-corrosion\/\">Galvanic Corrosion: An In-Depth Analysis<\/a><br \/><a href=\"https:\/\/orapiasia.com\/zh\/aircraft-corrosion-top-9-areas-prone-to-corrosion\/\">Aircraft Corrosion: 11 Areas Prone to Corrosion<\/a><br \/><a href=\"https:\/\/orapiasia.com\/zh\/types-of-corrosion-in-aircraft-aviation-mro\/\">Types of Corrosion in Aircraft: Aviation MRO<\/a><br \/><a href=\"https:\/\/orapiasia.com\/zh\/how-to-choose-the-right-corrosion-inhibitor\/\">How to Choose the Right Corrosion Inhibitor<\/a><br \/><\/span><u><\/u><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-889ed6f e-flex e-con-boxed e-con e-parent\" data-id=\"889ed6f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9ad733c elementor-widget elementor-widget-heading\" data-id=\"9ad733c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is Crevice Corrosion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-98c42a7 e-flex e-con-boxed e-con e-parent\" data-id=\"98c42a7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b87719f elementor-widget elementor-widget-text-editor\" data-id=\"b87719f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Crevice corrosion is a type of localised corrosion that occurs within confined spaces or crevices formed between two surfaces. It manifests in various alloys like stainless steel, aluminium, titanium, and copper. This type of corrosion is localised and involves the breakdown of the passive surface layer within crevices or shielded areas under surface deposits. Intentionally created or &#8216;designed in&#8217; crevices might be established at bolted joints, beneath flanges, between flanges and gaskets, or in contact areas such as valve seats.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-fb41750 e-flex e-con-boxed e-con e-parent\" data-id=\"fb41750\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-231e09b elementor-widget elementor-widget-image\" data-id=\"231e09b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1150\" height=\"402\" src=\"https:\/\/orapiasia.com\/wp-content\/uploads\/how-to-remove-crevice-corrosion-under-bolted-and-riveted-connections-1.jpg\" class=\"attachment-full size-full wp-image-29883\" alt=\"how to remove crevice corrosion under bolted and riveted connections\" srcset=\"https:\/\/orapiasia.com\/wp-content\/uploads\/\/how-to-remove-crevice-corrosion-under-bolted-and-riveted-connections-1.jpg 1150w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/how-to-remove-crevice-corrosion-under-bolted-and-riveted-connections-1-300x105.jpg 300w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/how-to-remove-crevice-corrosion-under-bolted-and-riveted-connections-1-1024x358.jpg 1024w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/how-to-remove-crevice-corrosion-under-bolted-and-riveted-connections-1-768x268.jpg 768w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/how-to-remove-crevice-corrosion-under-bolted-and-riveted-connections-1-510x178.jpg 510w\" sizes=\"(max-width: 1150px) 100vw, 1150px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0ed3ede e-flex e-con-boxed e-con e-parent\" data-id=\"0ed3ede\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cb0c716 elementor-widget elementor-widget-heading\" data-id=\"cb0c716\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Common Areas Prone to Crevice Corrosion\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-18ee8a3 e-flex e-con-boxed e-con e-parent\" data-id=\"18ee8a3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1074769 elementor-widget elementor-widget-text-editor\" data-id=\"1074769\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n<li><span data-preserver-spaces=\"true\">Bolted and riveted connections<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Beneath washers, gaskets, and clamps<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Below insulation<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Along lap joints<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Within fastener threads<\/span><\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1a65dee e-flex e-con-boxed e-con e-parent\" data-id=\"1a65dee\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7c7328d elementor-widget elementor-widget-heading\" data-id=\"7c7328d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Mechanism Behind Crevice Corrosion\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7e7f0a9 e-flex e-con-boxed e-con e-parent\" data-id=\"7e7f0a9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b606835 elementor-widget elementor-widget-image\" data-id=\"b606835\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"379\" height=\"295\" src=\"https:\/\/orapiasia.com\/wp-content\/uploads\/products-to-remove-crevice-corrosion.jpg\" class=\"attachment-full size-full wp-image-29884\" alt=\"products to remove crevice corrosion\" srcset=\"https:\/\/orapiasia.com\/wp-content\/uploads\/\/products-to-remove-crevice-corrosion.jpg 379w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/products-to-remove-crevice-corrosion-300x234.jpg 300w\" sizes=\"(max-width: 379px) 100vw, 379px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ffd79fe e-flex e-con-boxed e-con e-parent\" data-id=\"ffd79fe\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6c1bbe5 elementor-widget elementor-widget-image\" data-id=\"6c1bbe5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"376\" height=\"139\" src=\"https:\/\/orapiasia.com\/wp-content\/uploads\/when-does-crevice-corrosion-occur.jpg\" class=\"attachment-full size-full wp-image-29885\" alt=\"when does crevice corrosion occur\" srcset=\"https:\/\/orapiasia.com\/wp-content\/uploads\/\/when-does-crevice-corrosion-occur.jpg 376w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/when-does-crevice-corrosion-occur-300x111.jpg 300w\" sizes=\"(max-width: 376px) 100vw, 376px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Image credits: https:\/\/www.sciencedirect.com\/topics\/chemistry\/crevice-corrosion<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9c8b07c e-flex e-con-boxed e-con e-parent\" data-id=\"9c8b07c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cfe9cf0 elementor-widget elementor-widget-text-editor\" data-id=\"cfe9cf0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>For corrosion to occur effectively, the crevice must facilitate the entry of corrosive electrolytes and create &#8216;stagnant&#8217; conditions. The concern arises when gaps are a few micrometres wide, but there&#8217;s no absolute size threshold that guarantees corrosion.<\/p>\n<p>Similar to pitting, crevice attack is a form of localised surface corrosion. The process involves two distinct phases: initiation and propagation. Various theories exist, with John Sedriks&#8217; summary in &#8216;Corrosion of Stainless Steels&#8217; providing valuable insights. Sedriks suggest initial general corrosion in a passive state. The anodic release of metal ions (M+) is counterbalanced by a nearby cathodic reaction that consumes oxygen from the surroundings. In a crevice, oxygen depletion can occur quickly, especially under stagnant conditions, impeding oxygen replenishment from the bulk solution. This ongoing reaction outside the crevice supports a corrosion cell, liberating metal ions in the anodic crevice, resulting in a buildup of positively charged metal ions. This progression leads to the well-known effects of chloride and pH on crevice (and pitting) corrosion.<\/p>\n<p>The highly mobile chloride ion (Cl\u2013) easily migrates from the bulk solution to the narrow crevice, attracted by the positively charged metal ions (M+). Metal chloride, typically involving chromium, formed in the crevice, reacts with water to create hydrochloric acid. Acid accumulation reduces the pH until a &#8216;depassivation pH&#8217; is reached, breaching the passive film locally in the crevice, enabling the &#8216;pitting&#8217; attack to continue.<\/p>\n<p>Once depassivated, the attack accelerates and becomes self-sustaining, especially in the presence of ample chloride ions from the bulk solution. A less acknowledged point is that alloys are prone to corrosion at lower bulk chloride ion concentrations than those required for initiating pitting corrosion.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a9641cb e-flex e-con-boxed e-con e-parent\" data-id=\"a9641cb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9a58a3c elementor-widget elementor-widget-image\" data-id=\"9a58a3c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"809\" height=\"510\" src=\"https:\/\/orapiasia.com\/wp-content\/uploads\/pitting-corrosion-and-crevice-corrosion.jpg\" class=\"attachment-full size-full wp-image-29899\" alt=\"pitting corrosion and crevice corrosion\" srcset=\"https:\/\/orapiasia.com\/wp-content\/uploads\/\/pitting-corrosion-and-crevice-corrosion.jpg 809w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/pitting-corrosion-and-crevice-corrosion-300x189.jpg 300w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/pitting-corrosion-and-crevice-corrosion-768x484.jpg 768w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/pitting-corrosion-and-crevice-corrosion-510x322.jpg 510w\" sizes=\"(max-width: 809px) 100vw, 809px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">The processes involved in crevice corrosion, including the mechanisms of active and passive corrosion, as well as the corresponding anodic and cathodic reactions.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-71623b8 e-flex e-con-boxed e-con e-parent\" data-id=\"71623b8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-91ec3bc elementor-widget elementor-widget-heading\" data-id=\"91ec3bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Fontana and Greene Model\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a4e5635 e-flex e-con-boxed e-con e-parent\" data-id=\"a4e5635\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2b9ca32 elementor-widget elementor-widget-text-editor\" data-id=\"2b9ca32\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span data-preserver-spaces=\"true\">The crevice corrosion mechanism, as per the\u00a0<\/span><a class=\"editor-rtfLink\" href=\"https:\/\/soar.wichita.edu\/bitstream\/handle\/10057\/917\/grasp%20216.pdf\" target=\"_blank\" rel=\"noopener\"><span data-preserver-spaces=\"true\"><span style=\"text-decoration: underline;\">Fontana and Greene mode<\/span>l<\/span><\/a><span data-preserver-spaces=\"true\">, unfolds through four distinct stages:<\/span><\/p>\n<ul>\n<li><span data-preserver-spaces=\"true\">Initiation Stage: Initially, corrosion occurs both within and outside the crevice. The anodic reaction takes place where metal (M) turns into positively charged metallic ions (Mn+), while the cathodic reaction involves the reduction of oxygen (O2) and water (H2O) to form hydroxide ions (OH-). The presence of OH- neutralises the positively charged metallic ions.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Oxygen Depletion: Inside the crevice, the cathodic reaction exhausts most of the available oxygen.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Chemical Exchange: Cl- ions and OH- ions diffuse into the crevice to stabilise the electrochemical potential. Metal chloride is formed, leading to the hydrolysis of metal chloride, which results in a decrease in pH (acidification), causing the formation of metal hydroxide and hydrochloric acid.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Accelerated Corrosion: Continued attack by Mn+ ions on Cl- further decreases the pH within the crevice. This intensified metal dissolution generates more Mn+ ions, perpetuating a cycle of lowered pH and increased metal dissolution. This ultimately results in the acceleration of the corrosion process.<\/span><\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d223a6e e-flex e-con-boxed e-con e-parent\" data-id=\"d223a6e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7c7bb7d elementor-widget elementor-widget-heading\" data-id=\"7c7bb7d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Factors Impacting Crevice Corrosion Risk and Severity<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5f57446 e-flex e-con-boxed e-con e-parent\" data-id=\"5f57446\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5c6f1bb elementor-widget elementor-widget-heading\" data-id=\"5c6f1bb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Diverse Crevice Types<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-43aae5a e-flex e-con-boxed e-con e-parent\" data-id=\"43aae5a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1270473 elementor-widget elementor-widget-text-editor\" data-id=\"1270473\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Different behaviours are observed between metal-to-metal crevices versus metal-to-nonmetal crevices.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-95252b3 e-flex e-con-boxed e-con e-parent\" data-id=\"95252b3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dad8df4 elementor-widget elementor-widget-heading\" data-id=\"dad8df4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Physical Attributes of Crevices\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4d643e8 e-flex e-con-boxed e-con e-parent\" data-id=\"4d643e8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-32e0c46 elementor-widget elementor-widget-text-editor\" data-id=\"32e0c46\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span data-preserver-spaces=\"true\">Factors such as the size of the gap, depth, and surface texture in and around the crevice are important in influencing the risk and progression of corrosion.\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0aebfc6 e-flex e-con-boxed e-con e-parent\" data-id=\"0aebfc6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f389f63 elementor-widget elementor-widget-heading\" data-id=\"f389f63\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Metallic Composition\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-008391e e-flex e-con-boxed e-con e-parent\" data-id=\"008391e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-304c1b6 elementor-widget elementor-widget-text-editor\" data-id=\"304c1b6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span data-preserver-spaces=\"true\">Different alloys offer varying degrees of resistance to corrosion. Often, alloys that display strong resistance to pitting corrosion also exhibit improved resistance to crevice corrosion.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2909f86 e-flex e-con-boxed e-con e-parent\" data-id=\"2909f86\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dc1bcd4 elementor-widget elementor-widget-heading\" data-id=\"dc1bcd4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Environmental Conditions\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-16d7c15 e-flex e-con-boxed e-con e-parent\" data-id=\"16d7c15\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-116278a elementor-widget elementor-widget-text-editor\" data-id=\"116278a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span data-preserver-spaces=\"true\">Piping systems with ample space for electrolyte circulation and higher flow rates typically demonstrate greater resistance to crevice corrosion. This is attributed to reduced stagnant electrolyte pockets, and even when electrolytes are trapped, higher flow rates facilitate the exchange of trapped electrolytes with fresh ones, mitigating the initiation of corrosion.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a3fdd63 e-flex e-con-boxed e-con e-parent\" data-id=\"a3fdd63\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9124988 elementor-widget elementor-widget-heading\" data-id=\"9124988\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Electrolyte Solution Characteristics\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4e6be58 e-flex e-con-boxed e-con e-parent\" data-id=\"4e6be58\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c247039 elementor-widget elementor-widget-text-editor\" data-id=\"c247039\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span data-preserver-spaces=\"true\">Factors such as solution temperature, pH levels, oxygen content, and presence of halide or chloride ions, among other traits, not only affect the risk of corrosion but also determine the aggressiveness of corrosion propagation once an attack begins.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-757cca3 e-flex e-con-boxed e-con e-parent\" data-id=\"757cca3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a27eac8 elementor-widget elementor-widget-heading\" data-id=\"a27eac8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Choosing Alloys to Prevent Crevice Corrosion\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b935e1a e-flex e-con-boxed e-con e-parent\" data-id=\"b935e1a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fb30d7f elementor-widget elementor-widget-image\" data-id=\"fb30d7f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"378\" src=\"https:\/\/orapiasia.com\/wp-content\/uploads\/corrosion-resistant-alloys.jpg\" class=\"attachment-full size-full wp-image-29895\" alt=\"corrosion resistant alloys\" srcset=\"https:\/\/orapiasia.com\/wp-content\/uploads\/\/corrosion-resistant-alloys.jpg 1000w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/corrosion-resistant-alloys-300x113.jpg 300w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/corrosion-resistant-alloys-768x290.jpg 768w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/corrosion-resistant-alloys-510x193.jpg 510w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-32fd1ae e-flex e-con-boxed e-con e-parent\" data-id=\"32fd1ae\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3bbf4c4 elementor-widget elementor-widget-text-editor\" data-id=\"3bbf4c4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The resistance of passive layers in stainless steel relies on the promotion of chromium and the support from nickel. While chromium metal ions predominantly support anodic reactions in crevice corrosion more than iron or nickel, alloys with higher chromium content demonstrate superior resistance against crevice corrosion. Among stainless steels with the same chromium levels, austenitic types generally exhibit better resistance compared to lower-nickel ferritic variants. The presence of molybdenum and nitrogen significantly enhances resistance, with molybdenum aiding in slowing down the attack after depassivation occurs, typically leading to rapid attack.<\/p>\n<p>In a broad context, stainless steel variants like 6% molybdenum austenitic and superduplex grades are anticipated to offer the highest resistance against crevice corrosion. As a reference point, the following common stainless steels are ranked in decreasing order of crevice corrosion resistance:<\/p>\n<p>1.4547 and 1.4529 (6% Mo austenitic), alongside 1.4501, 1.4410, and 1.4507 (superduplex)<br>1.4462 (2205)<br>1.4539 (904L)<br>1.4401\/1.4436 (316)<br>1.4301 (304)<br>1.4016 (430)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0132e6d e-flex e-con-boxed e-con e-parent\" data-id=\"0132e6d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-63ce52c elementor-widget elementor-widget-heading\" data-id=\"63ce52c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">3 Categories of Coating to Prevent Crevice Corrosion\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-bbf122e e-flex e-con-boxed e-con e-parent\" data-id=\"bbf122e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-11c41d1 elementor-widget elementor-widget-image\" data-id=\"11c41d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"235\" src=\"https:\/\/orapiasia.com\/wp-content\/uploads\/coatings-to-prevent-corrosion.jpg\" class=\"attachment-full size-full wp-image-29896\" alt=\"coatings to prevent corrosion\" srcset=\"https:\/\/orapiasia.com\/wp-content\/uploads\/\/coatings-to-prevent-corrosion.jpg 500w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/coatings-to-prevent-corrosion-300x141.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e90f592 e-flex e-con-boxed e-con e-parent\" data-id=\"e90f592\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8448701 elementor-widget elementor-widget-text-editor\" data-id=\"8448701\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>If your coating projects have a short lifespan, it&#8217;s likely that you haven&#8217;t chosen the most suitable system for the job.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5beec5a e-flex e-con-boxed e-con e-parent\" data-id=\"5beec5a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-318bdb1 elementor-widget elementor-widget-heading\" data-id=\"318bdb1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Barrier Coatings<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-eb22881 e-flex e-con-boxed e-con e-parent\" data-id=\"eb22881\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b46467c elementor-widget elementor-widget-text-editor\" data-id=\"b46467c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Barrier coatings create a physical barrier between the metal surface and the corrosive environment. They are typically non-permeable coatings, such as paints, epoxies, or polymer films. By forming a protective layer, barrier coatings prevent moisture, oxygen, and corrosive substances from coming into contact with the metal surface. This isolates the metal from the external environment, reducing the likelihood of crevice corrosion.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5f4d912 e-flex e-con-boxed e-con e-parent\" data-id=\"5f4d912\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5023814 elementor-widget elementor-widget-heading\" data-id=\"5023814\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Sacrificial Barrier Coatings\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-82fc181 e-flex e-con-boxed e-con e-parent\" data-id=\"82fc181\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3a789f9 elementor-widget elementor-widget-text-editor\" data-id=\"3a789f9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Sacrificial barrier coatings, also known as sacrificial anode coatings, work by incorporating a sacrificial metal, typically zinc or magnesium, into the coating system. When the coating gets damaged or wears away, the sacrificial metal corrodes preferentially, protecting the underlying metal. This sacrificial action prevents the initiation of crevice corrosion because the less noble sacrificial metal corrodes before the base metal.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-09a7cf7 e-flex e-con-boxed e-con e-parent\" data-id=\"09a7cf7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-37fa16e elementor-widget elementor-widget-heading\" data-id=\"37fa16e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Chemically Active Corrosion Mitigation Coatings\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1601daf e-flex e-con-boxed e-con e-parent\" data-id=\"1601daf\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b3e6419 elementor-widget elementor-widget-text-editor\" data-id=\"b3e6419\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Chemically active corrosion mitigation coatings are designed to release specific chemicals or inhibitors when exposed to a corrosive environment. These chemicals can neutralise or inhibit the corrosive process. For crevice corrosion prevention, these coatings release substances that can prevent the buildup of corrosive agents within crevices and pits. This inhibits the localised corrosion process and extends the lifespan of the coated metal.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-95d9bd2 e-flex e-con-boxed e-con e-parent\" data-id=\"95d9bd2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dfa6536 elementor-widget elementor-widget-heading\" data-id=\"dfa6536\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Chemically Active Corrosion Mitigation Coatings\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8880194 e-flex e-con-boxed e-con e-parent\" data-id=\"8880194\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1d79841 elementor-widget elementor-widget-image\" data-id=\"1d79841\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"326\" src=\"https:\/\/orapiasia.com\/wp-content\/uploads\/how-to-avoid-crevice-corrosion.jpeg\" class=\"attachment-full size-full wp-image-29897\" alt=\"\" srcset=\"https:\/\/orapiasia.com\/wp-content\/uploads\/\/how-to-avoid-crevice-corrosion.jpeg 1000w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/how-to-avoid-crevice-corrosion-300x98.jpeg 300w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/how-to-avoid-crevice-corrosion-768x250.jpeg 768w, https:\/\/orapiasia.com\/wp-content\/uploads\/\/how-to-avoid-crevice-corrosion-510x166.jpeg 510w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c67073a e-flex e-con-boxed e-con e-parent\" data-id=\"c67073a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-522feb8 elementor-widget elementor-widget-heading\" data-id=\"522feb8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Design Considerations to Prevent Crevices\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c4350c2 e-flex e-con-boxed e-con e-parent\" data-id=\"c4350c2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e527065 elementor-widget elementor-widget-text-editor\" data-id=\"e527065\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span data-preserver-spaces=\"true\">Ensure open junction points in the design. Eliminate intentional crevices in flanged or bolted joints, whether between metal-to-metal or metal-to-non-metal contact points. Insulating gaskets may not necessarily prevent corrosion. Emphasise good fit-up and adhesion of non-metal joints or gaskets to avoid crevice formation between different materials.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d4a49f3 e-flex e-con-boxed e-con e-parent\" data-id=\"d4a49f3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8c3f163 elementor-widget elementor-widget-heading\" data-id=\"8c3f163\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Fabrication Practices to Avoid Crevices\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-58832e0 e-flex e-con-boxed e-con e-parent\" data-id=\"58832e0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-12f7645 elementor-widget elementor-widget-text-editor\" data-id=\"12f7645\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span data-preserver-spaces=\"true\">During fabrication, avoid crevice formation in welded joints by achieving full bead penetration. Complete root penetration is crucial, focusing on creating rounded and smooth beads without undercut in the internal bead to the parent metal area.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-10c58fa e-flex e-con-boxed e-con e-parent\" data-id=\"10c58fa\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a552ed2 elementor-widget elementor-widget-heading\" data-id=\"a552ed2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Operational Measures to Prevent Crevices\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8fe5cb4 e-flex e-con-boxed e-con e-parent\" data-id=\"8fe5cb4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fd0a114 elementor-widget elementor-widget-text-editor\" data-id=\"fd0a114\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span data-preserver-spaces=\"true\">Prevent the accumulation of scale or sediment in tanks that can lead to crevice (shielding) corrosion. Consider implementing measures to prevent buildup or establish a routine cleaning\/maintenance program, especially when some buildup is unavoidable.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-332d4fb e-flex e-con-boxed e-con e-parent\" data-id=\"332d4fb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5257e5b elementor-widget elementor-widget-heading\" data-id=\"5257e5b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Other Considerations to Prevent Crevice Corrosion\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ad86f3f e-flex e-con-boxed e-con e-parent\" data-id=\"ad86f3f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e1ade50 elementor-widget elementor-widget-text-editor\" data-id=\"e1ade50\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n<li><span data-preserver-spaces=\"true\">Opt for butt weld connections over bolted or threaded joints in new equipment.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Employ continuous welding or soldering to eradicate crevices in lap joints.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Ensure thorough vessel drainage wherever feasible and design non-draining areas to facilitate ample solution flow, preventing stagnation.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Utilise solid, non-absorbent gaskets when viable.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Select alloys with superior ratings based on <span style=\"text-decoration: underline;\"><a href=\"https:\/\/www.astm.org\/\">ASTM G48<\/a><\/span> standards to enhance resistance against crevice corrosion.\u00a0<\/span><\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c7f6224 e-flex e-con-boxed e-con e-parent\" data-id=\"c7f6224\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8f53aa4 elementor-widget elementor-widget-heading\" data-id=\"8f53aa4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Key Takeaways<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e94f293 e-flex e-con-boxed e-con e-parent\" data-id=\"e94f293\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c4f1139 elementor-widget elementor-widget-text-editor\" data-id=\"c4f1139\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol>\n<li><span data-preserver-spaces=\"true\">Crevice corrosion necessitates two specific conditions: a gap between a metal surface and another metal or non-metal surface, along with the presence of a stagnant electrolyte.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Detection of crevice corrosion might not be immediate and often requires close visual inspection.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Minimising gaps, especially in welds and joints, can mitigate the risk of corrosion.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Reducing risk involves ensuring complete drainage of vessels and eliminating electrolytes from surfaces.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Mitigating risk at connections and equipment can be achieved using solid, non-absorbent gaskets.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Materials demonstrating strong resistance to pitting corrosion often display high resistance to crevice corrosion as well.<\/span><\/li>\n<\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-aecd82d e-flex e-con-boxed e-con e-parent\" data-id=\"aecd82d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-2d3281c e-con-full e-flex e-con e-child\" data-id=\"2d3281c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-926b6e2 elementor-widget elementor-widget-heading\" data-id=\"926b6e2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion: Crevice Corrosion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-903b165 elementor-widget elementor-widget-text-editor\" data-id=\"903b165\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In summary, crevice corrosion, though hidden, poses significant risks to metal alloys. Understanding its mechanisms and preventive measures is crucial. Factors like physical attributes, metallic composition, and environmental conditions greatly impact its severity. Choosing resistant alloys, careful design, fabrication practices, and operational measures are key defences. Vigilant inspection, gap minimisation, and efficient drainage remain essential for combating this insidious threat. By implementing these strategies, structural integrity can be preserved, ensuring safety and reliability in various metal-based applications.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f56d3e6 e-flex e-con-boxed e-con e-parent\" data-id=\"f56d3e6\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-59a204e e-con-full e-flex e-con e-child\" data-id=\"59a204e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7a5ed7a elementor-widget elementor-widget-heading\" data-id=\"7a5ed7a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-default\">NEED MORE CLEANING  SUPPLIES?<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e80c459 elementor-widget elementor-widget-heading\" data-id=\"e80c459\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-heading-title elementor-size-default\">Full list of curated cleaning products.<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5db7659 elementor-mobile-align-center elementor-widget elementor-widget-button\" data-id=\"5db7659\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjIwNTk1IiwidG9nZ2xlIjpmYWxzZX0%3D\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">DOWNLOAD EBOOK NOW<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-16bf5f4 e-con-full e-flex e-con e-child\" data-id=\"16bf5f4\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-867a399 elementor-widget elementor-widget-image\" data-id=\"867a399\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1020\" height=\"1020\" src=\"https:\/\/orapiasia.com\/wp-content\/uploads\/Housekeeping-Hospitality-Opt-In-1024x1024.png\" class=\"attachment-large size-large wp-image-20592\" alt=\"Housekeeping Hospitality Cleaning Guide\" srcset=\"https:\/\/orapiasia.com\/wp-content\/uploads\/Housekeeping-Hospitality-Opt-In-1024x1024.png 1024w, https:\/\/orapiasia.com\/wp-content\/uploads\/Housekeeping-Hospitality-Opt-In-300x300.png 300w, https:\/\/orapiasia.com\/wp-content\/uploads\/Housekeeping-Hospitality-Opt-In-150x150.png 150w, https:\/\/orapiasia.com\/wp-content\/uploads\/Housekeeping-Hospitality-Opt-In-768x768.png 768w, https:\/\/orapiasia.com\/wp-content\/uploads\/Housekeeping-Hospitality-Opt-In-510x510.png 510w, https:\/\/orapiasia.com\/wp-content\/uploads\/Housekeeping-Hospitality-Opt-In-100x100.png 100w, https:\/\/orapiasia.com\/wp-content\/uploads\/Housekeeping-Hospitality-Opt-In.png 1080w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Numerous types of corrosion manifest visibly through extensive deterioration and discolouration. However, crevice corrosion initiates from a minute surface area and swiftly expands out of view within the metal, concealed beneath insulation or within tanks and vessels, resulting in potential component or structural failure without adequate warning. Thankfully, the origins of crevice corrosion are thoroughly [&#8230;]\n","protected":false},"author":50,"featured_media":29909,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1589],"tags":[1648,1650,1662],"class_list":["post-29868","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-maintenance2","tag-protection","tag-remover","tag-chemical-corrosion-opt-in"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Crevice Corrosion: An In-Depth Analysis | ORAPI Asia<\/title>\n<meta name=\"description\" content=\"Crevice corrosion manifests in various alloys like stainless steel, aluminium, titanium, and copper. 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