{"id":2456,"date":"2023-10-29T15:42:54","date_gmt":"2023-10-29T15:42:54","guid":{"rendered":"https:\/\/www.deltar.it\/index.php\/2023\/10\/29\/galvanic-corrosion-a-comprehensive-guide\/"},"modified":"2023-10-29T15:42:54","modified_gmt":"2023-10-29T15:42:54","slug":"galvanic-corrosion-a-comprehensive-guide","status":"publish","type":"post","link":"https:\/\/www.deltar.it\/en\/index.php\/2023\/10\/29\/galvanic-corrosion-a-comprehensive-guide\/","title":{"rendered":"Galvanic corrosion &#8211; a comprehensive guide"},"content":{"rendered":"<p>Galvanic corrosion is a chemical and physical phenomenon that affects metals and their alloys when they come in contact with an electrolyte and are electrically connected to a different metal. This type of corrosion is of particular relevance in materials engineering, metalwork preservation, and many industrial and marine applications. To fully understand galvanic corrosion, it is necessary to explore its mechanisms, causes, consequences, and prevention strategies.<\/p>\n<figure id=\"attachment_1802\" aria-describedby=\"caption-attachment-1802\" style=\"width: 300px\" class=\"wp-caption alignleft\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-medium wp-image-1802\" src=\"https:\/\/www.deltar.it\/wp-content\/uploads\/2023\/10\/Galvanic_cell_with_no_cation_flow.svg_-300x174.png\" alt=\"Galvanic Corrosion\" width=\"300\" height=\"174\" srcset=\"https:\/\/www.deltar.it\/wp-content\/uploads\/2023\/10\/Galvanic_cell_with_no_cation_flow.svg_-300x174.png 300w, https:\/\/www.deltar.it\/wp-content\/uploads\/2023\/10\/Galvanic_cell_with_no_cation_flow.svg_-1024x595.png 1024w, https:\/\/www.deltar.it\/wp-content\/uploads\/2023\/10\/Galvanic_cell_with_no_cation_flow.svg_-768x446.png 768w, https:\/\/www.deltar.it\/wp-content\/uploads\/2023\/10\/Galvanic_cell_with_no_cation_flow.svg_-1536x892.png 1536w, https:\/\/www.deltar.it\/wp-content\/uploads\/2023\/10\/Galvanic_cell_with_no_cation_flow.svg_.png 1920w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1802\" class=\"wp-caption-text\">taken from Wikipedia<\/figcaption><\/figure>\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.deltar.it\/en\/index.php\/2023\/10\/29\/galvanic-corrosion-a-comprehensive-guide\/#The_Mechanisms\" >The Mechanisms<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.deltar.it\/en\/index.php\/2023\/10\/29\/galvanic-corrosion-a-comprehensive-guide\/#Some_Metals_Commonly_Subjected\" >Some Metals Commonly Subjected<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.deltar.it\/en\/index.php\/2023\/10\/29\/galvanic-corrosion-a-comprehensive-guide\/#Factors_Influencing_Galvanic_Corrosion\" >Factors Influencing Galvanic Corrosion.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.deltar.it\/en\/index.php\/2023\/10\/29\/galvanic-corrosion-a-comprehensive-guide\/#Corrosion_Prevention_and_Counteraction\" >Corrosion Prevention and Counteraction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.deltar.it\/en\/index.php\/2023\/10\/29\/galvanic-corrosion-a-comprehensive-guide\/#Chemical_Nickel_Plating_as_a_Solution_to_Electrolytic_Corrosion\" >Chemical Nickel Plating as a Solution to Electrolytic Corrosion<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"The_Mechanisms\"><\/span>The Mechanisms<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Galvanic corrosion occurs when two dissimilar metals, or metal alloys, are placed in electrical contact in the presence of an electrolyte, which can be a conducting liquid such as saline water. The metals involved have different electrochemical potentials. In this galvanic pair, the metal with the most negative potential becomes the anode and oxidizes, giving up electrons, while the metal with the most positive potential acts as the cathode and receives electrons.<\/p>\n<p>The anode undergoes gradual dissolution, with loss of material, while the cathode generally remains intact or may even be protected from galvanic reaction. The rate at which galvanic corrosion occurs depends on the potential difference between the two metals, the conductivity of the electrolyte, and the resistance of the overall electrical circuit.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Some_Metals_Commonly_Subjected\"><\/span>Some Metals Commonly Subjected<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Steel<\/li>\n<li>Iron<\/li>\n<li>Copper<\/li>\n<li>Aluminum<\/li>\n<li>Zinc<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Factors_Influencing_Galvanic_Corrosion\"><\/span>Factors Influencing Galvanic Corrosion.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Several factors influence the rate and intensity of galvanic corrosion, including:<\/p>\n<ul>\n<li><strong>Nature of metals<\/strong>: The difference in the standard electrode potentials of the metals involved is crucial. The greater the difference, the greater the risk of accelerated corrosion of the anode.<\/li>\n<li><strong>Metal area<\/strong>: If the area of the anode is small compared to that of the cathode, corrosion proceeds more rapidly because of the higher current density at the anode.<\/li>\n<li><strong>Electrolyte conditions<\/strong>: Temperature, salt concentration, pH, and the presence of oxygen affect the conductivity of the electrolyte and thus the rate of corrosion.<\/li>\n<li><strong>Distance between<\/strong> metals: A smaller distance between metals in a galvanic pair can increase the corrosion rate due to reduced electrical path resistance.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Corrosion_Prevention_and_Counteraction\"><\/span>Corrosion Prevention and Counteraction<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Material selection and compatible design<\/li>\n<li>Cathodic protection (expendable anodes)<\/li>\n<li>Protective coatings and paints<\/li>\n<li>Periodic inspection and maintenance<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Chemical_Nickel_Plating_as_a_Solution_to_Electrolytic_Corrosion\"><\/span>Chemical Nickel Plating as a Solution to Electrolytic Corrosion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Formation of a protective barrier<\/li>\n<li>Nickel coating properties (e.g., uniformity, corrosion resistance)<\/li>\n<li>Typical applications (electronic components, automotive parts)<\/li>\n<li>Learn more about the process of <a href=\"https:\/\/www.deltar.it\/en\/index.php\/chemical-nickel-plating\/\">Chemical Nickel Plating<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Learn more about each form of corrosion on <a href=\"https:\/\/it.wikipedia.org\/wiki\/Corrosione\">Wikipedia<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Galvanic corrosion is a chemical and physical phenomenon that affects metals and their alloys when they come in contact with an electrolyte and are electrically connected to a different metal. This type of corrosion is of particular relevance in materials engineering, metalwork preservation, and many industrial and marine applications. To fully understand galvanic corrosion, it [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":2392,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25,24],"tags":[],"class_list":["post-2456","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-en","category-insights"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.7 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Galvanic corrosion - a comprehensive guide - Deltar Co-Deposition<\/title>\n<meta name=\"description\" content=\"Galvanic corrosion is a chemical and physical phenomenon that affects metals and their alloys when ... find out about it here!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.deltar.it\/en\/index.php\/2023\/10\/29\/galvanic-corrosion-a-comprehensive-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Galvanic corrosion - a comprehensive guide\" \/>\n<meta property=\"og:description\" content=\"Galvanic corrosion is a chemical and physical phenomenon that affects metals and their alloys when ... find out about it here!\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.deltar.it\/en\/index.php\/2023\/10\/29\/galvanic-corrosion-a-comprehensive-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"Deltar Co-Deposition\" \/>\n<meta property=\"article:published_time\" content=\"2023-10-29T15:42:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.deltar.it\/wp-content\/uploads\/2023\/10\/Galvanic_cell_with_no_cation_flow.svg_.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1115\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Edoardo Taroni\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Edoardo Taroni\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.deltar.it\\\/en\\\/index.php\\\/2023\\\/10\\\/29\\\/galvanic-corrosion-a-comprehensive-guide\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.deltar.it\\\/en\\\/index.php\\\/2023\\\/10\\\/29\\\/galvanic-corrosion-a-comprehensive-guide\\\/\"},\"author\":{\"name\":\"Edoardo Taroni\",\"@id\":\"https:\\\/\\\/www.deltar.it\\\/en\\\/#\\\/schema\\\/person\\\/9126acba5efe4d3944628ab8059af6ed\"},\"headline\":\"Galvanic corrosion &#8211; 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