{"id":1811,"date":"2024-07-30T19:44:33","date_gmt":"2024-07-30T19:44:33","guid":{"rendered":"https:\/\/svestudy.com\/?page_id=1811"},"modified":"2025-05-11T10:54:39","modified_gmt":"2025-05-11T10:54:39","slug":"ame-unit-6-q4","status":"publish","type":"page","link":"https:\/\/svestudy.com\/?page_id=1811","title":{"rendered":"AME Unit 7 Q1"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"158\" src=\"https:\/\/svestudy.com\/wp-content\/uploads\/2024\/08\/image-328-1024x158.png\" alt=\"\" class=\"wp-image-6162\" srcset=\"https:\/\/svestudy.com\/wp-content\/uploads\/2024\/08\/image-328-1024x158.png 1024w, https:\/\/svestudy.com\/wp-content\/uploads\/2024\/08\/image-328-300x46.png 300w, https:\/\/svestudy.com\/wp-content\/uploads\/2024\/08\/image-328-768x118.png 768w, https:\/\/svestudy.com\/wp-content\/uploads\/2024\/08\/image-328.png 1083w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">(a) Describe the problems associated with two dissimilar metals in contact in the presence of sea water.(4)<br>(b) Describe THREE different methods that may be used to reduce the problems described in part (a).(6)<\/p>\n\n\n<div class=\"wp-block-ub-content-toggle wp-block-ub-content-toggle-block\" id=\"ub-content-toggle-block-a8962bc4-f379-4247-ae4e-ff02c55d2107\" data-mobilecollapse=\"true\" data-desktopcollapse=\"true\" data-preventcollapse=\"false\" data-showonlyone=\"false\">\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; border-top-left-radius: 8px; border-top-right-radius: 8px; border-bottom-left-radius: 8px; border-bottom-right-radius: 8px; \" id=\"ub-content-toggle-panel-block-1ca84eac-1f5a-44d6-a903-222b5d941de9\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-0-a8962bc4-f379-4247-ae4e-ff02c55d2107\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-a8962bc4-f379-4247-ae4e-ff02c55d2107\" style=\"color: #000000; \">Problems Associated with Dissimilar Metals in Seawater<\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-0-a8962bc4-f379-4247-ae4e-ff02c55d2107\">\n\n<p class=\"wp-block-paragraph\">When two different metals come into contact in a seawater environment, a phenomenon called <strong>galvanic corrosion<\/strong> can occur. This is an electrochemical process where one metal acts as an anode and corrodes preferentially, while the other metal acts as a cathode and is protected. \u00a0<a href=\"https:\/\/armoloy.com\/understanding-galvanic-corrosion-causes-prevention-and-solutions\/#:~:text=Galvanic%20corrosion%2C%20also%20known%20as,two%20different%20metals%20are%20in\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/armoloy.com\/understanding-galvanic-corrosion-causes-prevention-and-solutions\/#:~:text=Galvanic%20corrosion%2C%20also%20known%20as,two%20different%20metals%20are%20in\">1. Understanding Galvanic Corrosion: Concepts, Causes, and Prevention <\/a><a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/armoloy.com\/understanding-galvanic-corrosion-causes-prevention-and-solutions\/#:~:text=Galvanic%20corrosion%2C%20also%20known%20as,two%20different%20metals%20are%20in\"><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/byjus.com\/chemistry\/galvanic-corrosion\/#:~:text=Galvanic%20corrosion%20(also%20called%20bimetallic,an%20electrolyte%2C%20one%20metal%20preferentially\" target=\"_blank\" rel=\"noreferrer noopener\">2. Galvanic Corrosion &#8211; Definition, Mechanism, Examples, Causes &amp; Prevention with Videos <\/a><a href=\"https:\/\/byjus.com\/chemistry\/galvanic-corrosion\/#:~:text=Galvanic%20corrosion%20(also%20called%20bimetallic,an%20electrolyte%2C%20one%20metal%20preferentially\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/byjus.com\/chemistry\/galvanic-corrosion\/#:~:text=Galvanic%20corrosion%20(also%20called%20bimetallic,an%20electrolyte%2C%20one%20metal%20preferentially\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Key Problems:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>Accelerated Corrosion:<\/strong> The anodic metal corrodes at a faster rate than it would if it were alone in seawater. \u00a0 <a href=\"https:\/\/www.ghp1.com\/blog\/understanding-dissimilar-metal-corrosion#:~:text=What%20is%20Galvanic%20Corrosion%3F,while%20the%20other%20remains%20protected.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.ghp1.com\/blog\/understanding-dissimilar-metal-corrosion#:~:text=What%20is%20Galvanic%20Corrosion%3F,while%20the%20other%20remains%20protected.\" target=\"_blank\" rel=\"noreferrer noopener\">1. Understanding Dissimilar Metal Corrosion &#8211; GHP <\/a><a href=\"https:\/\/www.ghp1.com\/blog\/understanding-dissimilar-metal-corrosion#:~:text=What%20is%20Galvanic%20Corrosion%3F,while%20the%20other%20remains%20protected.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.ghp1.com\/blog\/understanding-dissimilar-metal-corrosion#:~:text=What%20is%20Galvanic%20Corrosion%3F,while%20the%20other%20remains%20protected.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.ghp1.com\/blog\/understanding-dissimilar-metal-corrosion#:~:text=What%20is%20Galvanic%20Corrosion%3F,while%20the%20other%20remains%20protected.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.ghp1.com\/blog\/understanding-dissimilar-metal-corrosion#:~:text=What%20is%20Galvanic%20Corrosion%3F,while%20the%20other%20remains%20protected.\" target=\"_blank\" rel=\"noreferrer noopener\">www.ghp1.com<\/a><a href=\"https:\/\/www.ghp1.com\/blog\/understanding-dissimilar-metal-corrosion#:~:text=What%20is%20Galvanic%20Corrosion%3F,while%20the%20other%20remains%20protected.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li class=\"\"><strong>Structural Integrity:<\/strong> Severe corrosion can compromise the structural integrity of the metal components involved.<\/li>\n\n\n\n<li class=\"\"><strong>Economic Loss:<\/strong> Repair or replacement of corroded components can be costly. \u00a0 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Galvanic_corrosion\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/en.wikipedia.org\/wiki\/Galvanic_corrosion\" target=\"_blank\" rel=\"noreferrer noopener\">1. Galvanic corrosion &#8211; Wikipedia <\/a><a href=\"https:\/\/en.wikipedia.org\/wiki\/Galvanic_corrosion\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/en.wikipedia.org\/wiki\/Galvanic_corrosion\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/en.wikipedia.org\/wiki\/Galvanic_corrosion\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/en.wikipedia.org\/wiki\/Galvanic_corrosion\" target=\"_blank\" rel=\"noreferrer noopener\">en.wikipedia.org<\/a><a href=\"https:\/\/en.wikipedia.org\/wiki\/Galvanic_corrosion\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li class=\"\"><strong>Safety Risks:<\/strong> In extreme cases, galvanic corrosion can lead to equipment failure, posing safety risks.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Factors Affecting Galvanic Corrosion:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>Metal Combination:<\/strong> The further apart the metals are in the galvanic series, the greater the potential for corrosion. \u00a0 <a href=\"https:\/\/cathwell.com\/galvanic-series\/#:~:text=The%20closer%20a%20metal%20or,to%20those%20metals%20far%20apart.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/cathwell.com\/galvanic-series\/#:~:text=The%20closer%20a%20metal%20or,to%20those%20metals%20far%20apart.\" target=\"_blank\" rel=\"noreferrer noopener\">1. Galvanic series &#8211; Cathwell <\/a><a href=\"https:\/\/cathwell.com\/galvanic-series\/#:~:text=The%20closer%20a%20metal%20or,to%20those%20metals%20far%20apart.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/cathwell.com\/galvanic-series\/#:~:text=The%20closer%20a%20metal%20or,to%20those%20metals%20far%20apart.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/cathwell.com\/galvanic-series\/#:~:text=The%20closer%20a%20metal%20or,to%20those%20metals%20far%20apart.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/cathwell.com\/galvanic-series\/#:~:text=The%20closer%20a%20metal%20or,to%20those%20metals%20far%20apart.\" target=\"_blank\" rel=\"noreferrer noopener\">cathwell.com<\/a><a href=\"https:\/\/cathwell.com\/galvanic-series\/#:~:text=The%20closer%20a%20metal%20or,to%20those%20metals%20far%20apart.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li class=\"\"><strong>Electrolyte Conductivity:<\/strong> Seawater, with its high salt content, is an excellent conductor, accelerating the corrosion process. \u00a0 <a href=\"https:\/\/byjus.com\/question-answer\/among-distilled-water-tap-water-and-ocean-water-which-will-be-the-best-electrical-conductor\/#:~:text=It%20has%20a%20large%20number,very%20good%20conductor%20of%20electricity.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/byjus.com\/question-answer\/among-distilled-water-tap-water-and-ocean-water-which-will-be-the-best-electrical-conductor\/#:~:text=It%20has%20a%20large%20number,very%20good%20conductor%20of%20electricity.\" target=\"_blank\" rel=\"noreferrer noopener\">1. Among distilled water, tap water, and ocean water, which will be the best electrical conductor and why? &#8211; BYJU&#8217;S <\/a><a href=\"https:\/\/byjus.com\/question-answer\/among-distilled-water-tap-water-and-ocean-water-which-will-be-the-best-electrical-conductor\/#:~:text=It%20has%20a%20large%20number,very%20good%20conductor%20of%20electricity.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/byjus.com\/question-answer\/among-distilled-water-tap-water-and-ocean-water-which-will-be-the-best-electrical-conductor\/#:~:text=It%20has%20a%20large%20number,very%20good%20conductor%20of%20electricity.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/byjus.com\/question-answer\/among-distilled-water-tap-water-and-ocean-water-which-will-be-the-best-electrical-conductor\/#:~:text=It%20has%20a%20large%20number,very%20good%20conductor%20of%20electricity.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/byjus.com\/question-answer\/among-distilled-water-tap-water-and-ocean-water-which-will-be-the-best-electrical-conductor\/#:~:text=It%20has%20a%20large%20number,very%20good%20conductor%20of%20electricity.\" target=\"_blank\" rel=\"noreferrer noopener\">byjus.com<\/a><a href=\"https:\/\/byjus.com\/question-answer\/among-distilled-water-tap-water-and-ocean-water-which-will-be-the-best-electrical-conductor\/#:~:text=It%20has%20a%20large%20number,very%20good%20conductor%20of%20electricity.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li class=\"\"><strong>Surface Area Ratio:<\/strong> The ratio of the anode to cathode area affects the corrosion rate. A larger anode compared to the cathode can intensify corrosion. \u00a0 <a href=\"https:\/\/www.jstage.jst.go.jp\/article\/matertrans\/62\/12\/62_MT-L2021011\/_html\/-char\/en#:~:text=A%20larger%20area%20ratio%20leads,such%20as%20painting%20at%20the\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.jstage.jst.go.jp\/article\/matertrans\/62\/12\/62_MT-L2021011\/_html\/-char\/en#:~:text=A%20larger%20area%20ratio%20leads,such%20as%20painting%20at%20the\" target=\"_blank\" rel=\"noreferrer noopener\">1. Effect of Area Ratio on the Galvanic Corrosion of AZX611 Magnesium Alloy\/A6N01 Aluminum Alloy Joint &#8211; J-Stage <\/a><a href=\"https:\/\/www.jstage.jst.go.jp\/article\/matertrans\/62\/12\/62_MT-L2021011\/_html\/-char\/en#:~:text=A%20larger%20area%20ratio%20leads,such%20as%20painting%20at%20the\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.jstage.jst.go.jp\/article\/matertrans\/62\/12\/62_MT-L2021011\/_html\/-char\/en#:~:text=A%20larger%20area%20ratio%20leads,such%20as%20painting%20at%20the\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.jstage.jst.go.jp\/article\/matertrans\/62\/12\/62_MT-L2021011\/_html\/-char\/en#:~:text=A%20larger%20area%20ratio%20leads,such%20as%20painting%20at%20the\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.jstage.jst.go.jp\/article\/matertrans\/62\/12\/62_MT-L2021011\/_html\/-char\/en#:~:text=A%20larger%20area%20ratio%20leads,such%20as%20painting%20at%20the\" target=\"_blank\" rel=\"noreferrer noopener\">www.jstage.jst.go.jp<\/a><a href=\"https:\/\/www.jstage.jst.go.jp\/article\/matertrans\/62\/12\/62_MT-L2021011\/_html\/-char\/en#:~:text=A%20larger%20area%20ratio%20leads,such%20as%20painting%20at%20the\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li class=\"\"><strong>Environmental Factors:<\/strong> Temperature, oxygen levels, and water flow can influence the rate of corrosion.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">To mitigate the effects of galvanic corrosion, it&#8217;s essential to understand the galvanic series and take appropriate measures, such as using sacrificial anodes or insulating dissimilar metals.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; border-top-left-radius: 8px; border-top-right-radius: 8px; border-bottom-left-radius: 8px; border-bottom-right-radius: 8px; \" id=\"ub-content-toggle-panel-block-50c3081e-c476-4a25-8b61-e8f47ef51336\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-1-a8962bc4-f379-4247-ae4e-ff02c55d2107\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-a8962bc4-f379-4247-ae4e-ff02c55d2107\" style=\"color: #000000; \">Methods to Reduce Galvanic Corrosion<\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-1-a8962bc4-f379-4247-ae4e-ff02c55d2107\">\n\n<p class=\"wp-block-paragraph\">There are several effective methods to mitigate galvanic corrosion:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Material Selection<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>Similar Metals:<\/strong> Using metals that are close together in the galvanic series can significantly reduce the corrosion rate. \u00a0 <a href=\"https:\/\/armoloy.com\/understanding-galvanic-corrosion-causes-prevention-and-solutions\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/armoloy.com\/understanding-galvanic-corrosion-causes-prevention-and-solutions\/\" target=\"_blank\" rel=\"noreferrer noopener\">1. Understanding Galvanic Corrosion: Concepts, Causes, and Prevention <\/a><a href=\"https:\/\/armoloy.com\/understanding-galvanic-corrosion-causes-prevention-and-solutions\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/armoloy.com\/understanding-galvanic-corrosion-causes-prevention-and-solutions\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/armoloy.com\/understanding-galvanic-corrosion-causes-prevention-and-solutions\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/armoloy.com\/understanding-galvanic-corrosion-causes-prevention-and-solutions\/\" target=\"_blank\" rel=\"noreferrer noopener\">armoloy.com<\/a><a href=\"https:\/\/armoloy.com\/understanding-galvanic-corrosion-causes-prevention-and-solutions\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li class=\"\"><strong>Noble Metals:<\/strong> Employing highly corrosion-resistant materials like titanium or stainless steel can minimize the risk.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Physical Separation<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>Insulation:<\/strong> Placing non-conductive materials between dissimilar metals can interrupt the electrical connection. \u00a0 <a href=\"https:\/\/www.unifiedalloys.com\/blog\/galvanic-corrosion#:~:text=Even%20with%20the%20ideal%20materials,does%20not%20completely%20prevent%20it.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.unifiedalloys.com\/blog\/galvanic-corrosion#:~:text=Even%20with%20the%20ideal%20materials,does%20not%20completely%20prevent%20it.\" target=\"_blank\" rel=\"noreferrer noopener\">1. Galvanic Corrosion: Avoidance and Risk Mitigation Explained &#8211; Unified Alloys <\/a><a href=\"https:\/\/www.unifiedalloys.com\/blog\/galvanic-corrosion#:~:text=Even%20with%20the%20ideal%20materials,does%20not%20completely%20prevent%20it.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.unifiedalloys.com\/blog\/galvanic-corrosion#:~:text=Even%20with%20the%20ideal%20materials,does%20not%20completely%20prevent%20it.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.unifiedalloys.com\/blog\/galvanic-corrosion#:~:text=Even%20with%20the%20ideal%20materials,does%20not%20completely%20prevent%20it.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.unifiedalloys.com\/blog\/galvanic-corrosion#:~:text=Even%20with%20the%20ideal%20materials,does%20not%20completely%20prevent%20it.\" target=\"_blank\" rel=\"noreferrer noopener\">www.unifiedalloys.com<\/a><a href=\"https:\/\/www.unifiedalloys.com\/blog\/galvanic-corrosion#:~:text=Even%20with%20the%20ideal%20materials,does%20not%20completely%20prevent%20it.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li class=\"\"><strong>Distance:<\/strong> Increasing the distance between dissimilar metals can reduce the severity of galvanic corrosion.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Sacrificial Anodes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>Zinc or Magnesium:<\/strong> Attaching a more reactive metal (anode) to the protected metal (cathode) causes the anode to corrode preferentially, protecting the main structure. \u00a0 <a href=\"https:\/\/chem.libretexts.org\/Bookshelves\/Analytical_Chemistry\/Supplemental_Modules_(Analytical_Chemistry)\/Electrochemistry\/Exemplars\/Corrosion\/Sacrificial_Anode\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/chem.libretexts.org\/Bookshelves\/Analytical_Chemistry\/Supplemental_Modules_(Analytical_Chemistry)\/Electrochemistry\/Exemplars\/Corrosion\/Sacrificial_Anode\" target=\"_blank\" rel=\"noreferrer noopener\">1. Sacrificial Anode &#8211; Chemistry LibreTexts <\/a><a href=\"https:\/\/chem.libretexts.org\/Bookshelves\/Analytical_Chemistry\/Supplemental_Modules_(Analytical_Chemistry)\/Electrochemistry\/Exemplars\/Corrosion\/Sacrificial_Anode\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/chem.libretexts.org\/Bookshelves\/Analytical_Chemistry\/Supplemental_Modules_(Analytical_Chemistry)\/Electrochemistry\/Exemplars\/Corrosion\/Sacrificial_Anode\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/chem.libretexts.org\/Bookshelves\/Analytical_Chemistry\/Supplemental_Modules_(Analytical_Chemistry)\/Electrochemistry\/Exemplars\/Corrosion\/Sacrificial_Anode\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/chem.libretexts.org\/Bookshelves\/Analytical_Chemistry\/Supplemental_Modules_(Analytical_Chemistry)\/Electrochemistry\/Exemplars\/Corrosion\/Sacrificial_Anode\" target=\"_blank\" rel=\"noreferrer noopener\">chem.libretexts.org<\/a><a href=\"https:\/\/chem.libretexts.org\/Bookshelves\/Analytical_Chemistry\/Supplemental_Modules_(Analytical_Chemistry)\/Electrochemistry\/Exemplars\/Corrosion\/Sacrificial_Anode\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Cathodic Protection<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>Impressed Current:<\/strong> Using an external power source to apply a current to the structure, making it a cathode and preventing corrosion.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Coatings and Inhibitors<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>Protective Coatings:<\/strong> Applying coatings like paint or epoxy can act as a barrier between the metal and the electrolyte. \u00a0 <a href=\"https:\/\/www.intechopen.com\/chapters\/64171#:~:text=As%20for%20ion%20diffusion%2C%20most,volume%20of%20their%20molecular%20structure.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.intechopen.com\/chapters\/64171#:~:text=As%20for%20ion%20diffusion%2C%20most,volume%20of%20their%20molecular%20structure.\" target=\"_blank\" rel=\"noreferrer noopener\">1. Transport of Electrolyte in Organic Coatings on Metal &#8211; IntechOpen <\/a><a href=\"https:\/\/www.intechopen.com\/chapters\/64171#:~:text=As%20for%20ion%20diffusion%2C%20most,volume%20of%20their%20molecular%20structure.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.intechopen.com\/chapters\/64171#:~:text=As%20for%20ion%20diffusion%2C%20most,volume%20of%20their%20molecular%20structure.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.intechopen.com\/chapters\/64171#:~:text=As%20for%20ion%20diffusion%2C%20most,volume%20of%20their%20molecular%20structure.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/www.intechopen.com\/chapters\/64171#:~:text=As%20for%20ion%20diffusion%2C%20most,volume%20of%20their%20molecular%20structure.\" target=\"_blank\" rel=\"noreferrer noopener\">www.intechopen.com<\/a><a href=\"https:\/\/www.intechopen.com\/chapters\/64171#:~:text=As%20for%20ion%20diffusion%2C%20most,volume%20of%20their%20molecular%20structure.\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li class=\"\"><strong>Corrosion Inhibitors:<\/strong> Adding chemicals to the seawater can slow down the corrosion process.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">By implementing these methods, the risk of galvanic corrosion can be significantly reduced, extending the lifespan of marine structures and equipment.<\/p>\n\n<\/div>\n\t\t<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>(a) Describe the problems associated with two dissimilar metals in contact in the presence of sea water.(4)(b) Describe THREE different methods that may be used to reduce the problems described in part (a).(6)<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"templates\/template-full-width.php","meta":{"nf_dc_page":"","footnotes":""},"class_list":["post-1811","page","type-page","status-publish","hentry"],"featured_image_src":null,"_links":{"self":[{"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/pages\/1811","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/svestudy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1811"}],"version-history":[{"count":5,"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/pages\/1811\/revisions"}],"predecessor-version":[{"id":9819,"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/pages\/1811\/revisions\/9819"}],"wp:attachment":[{"href":"https:\/\/svestudy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1811"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}