{"id":7771,"date":"2016-10-10T12:37:00","date_gmt":"2016-10-10T10:37:00","guid":{"rendered":"https:\/\/www.victronenergy.com\/blog\/?p=7771"},"modified":"2016-10-10T13:00:56","modified_gmt":"2016-10-10T11:00:56","slug":"protect-your-boat-from-galvanic-corrosion","status":"publish","type":"post","link":"https:\/\/www.victronenergy.com\/blog\/2016\/10\/10\/protect-your-boat-from-galvanic-corrosion\/","title":{"rendered":"Protect your boat from galvanic corrosion"},"content":{"rendered":"<p>Here is a short guest blog from Victron Energy distributor Energy Solutions, which I hope fellow sailors will find useful. In fact, when I was looking for a galvanic corrosion solution for my own boat I didn&#8217;t even realise Victron Energy made them!<\/p>\n<p>And on that note if you want a quick way to see the full range of Victron products, at a glance, I find the pricelist with images in it very handy: <a href=\"https:\/\/www.victronenergy.com\/information\/pricelist\" target=\"_blank\">https:\/\/www.victronenergy.com\/information\/pricelist<\/a><\/p>\n<p>Thanks to Melanie Lay of <a href=\"http:\/\/energy-solutions.co.uk\/\" target=\"_blank\">Energy Solutions<\/a> for sending me the information used in this blog.<\/p>\n<p>John Rushworth<!--more--><\/p>\n<h3>Galvanic corrosion<\/h3>\n<p>Galvanic corrosion is the process that can cause the hull of your boat to start to corrode when you are connected to shore power. Corrosion occurs when two dissimilar metals are immersed in a conductive solution (sea water) and are electrically connected (by the shore connection). One metal is protected, whilst the other is corroded i.e. your boat\u2019s hull.<\/p>\n<p>This is the same type of corrosion that occurs in a battery to release energy. This type of corrosion can cause an electrical current to run from your boat\u2019s hull to the shoreline; which could potentially electrocute a swimmer swimming between your boat and the shore when you are connected to the shore power. It is essential you protect your boat and the swimmers in the water from this risk.<\/p>\n<p>There is a common misconception that galvanic corrosion can only occur in metal or aluminium hulls but in fact, it can occur in any boat that has metal in contact with the water such as the propeller and shaft, skin fittings etc.<\/p>\n<h3>Solutions<\/h3>\n<p>There are two ways to protect from galvanic corrosion; either by installing an isolation transformer or a galvanic isolator.<\/p>\n<p>An <a href=\"https:\/\/www.victronenergy.com\/isolation-transformers\/isolation-transformers-2000va-3600va-7000va\" target=\"_blank\">isolation transformer<\/a> eliminates any electrical continuity between shore power and the boat. The shore power is fed to the primary side of the transformer and the ship is connected to the secondary. The isolation transformer completely isolates the boat from the shore ground. By connecting all metal parts to the neutral output on the secondary side of the transformer, in the case of a short circuit a circuit breaker will trip or a fuse will blow.<\/p>\n<p><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Isolation_Transformer_2000W_19941125.png\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-blogpost-content wp-image-7782\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Isolation_Transformer_2000W_19941125-690x1037.png\" alt=\"isolation_transformer_2000w\" width=\"690\" height=\"1037\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Isolation_Transformer_2000W_19941125-690x1037.png 690w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Isolation_Transformer_2000W_19941125-730x1097.png 730w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Isolation_Transformer_2000W_19941125-681x1024.png 681w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Isolation_Transformer_2000W_19941125-768x1154.png 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Isolation_Transformer_2000W_19941125-200x300.png 200w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Isolation_Transformer_2000W_19941125.png 1920w\" sizes=\"auto, (max-width: 690px) 100vw, 690px\" \/><\/a><\/p>\n<p>Another option is to install a <a href=\"https:\/\/www.victronenergy.com\/isolation-transformers\/galvanic-isolator\" target=\"_blank\">galvanic isolator<\/a>, this consists of two internal diodes which are connected in anti-parallel. When they are connected in this way, the diodes allow current in both directions but only above a certain threshold voltage.<\/p>\n<p><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Galvanic-Isolator-VDI-16_side_19941156.png\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-blogpost-content wp-image-7783\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Galvanic-Isolator-VDI-16_side_19941156-690x384.png\" alt=\"galvanic-isolator-vdi-16_side\" width=\"690\" height=\"384\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Galvanic-Isolator-VDI-16_side_19941156-690x384.png 690w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Galvanic-Isolator-VDI-16_side_19941156-270x150.png 270w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Galvanic-Isolator-VDI-16_side_19941156-730x406.png 730w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Galvanic-Isolator-VDI-16_side_19941156-1024x570.png 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Galvanic-Isolator-VDI-16_side_19941156-768x428.png 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Galvanic-Isolator-VDI-16_side_19941156-300x167.png 300w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2016\/10\/Galvanic-Isolator-VDI-16_side_19941156.png 1920w\" sizes=\"auto, (max-width: 690px) 100vw, 690px\" \/><\/a><\/p>\n<p>The isolator is installed directly behind your boat&#8217;s 230V connection. The forward voltage from the galvanic isolator is higher than the potential difference between metals. As a result, this voltage will not allow conduction and as such, the galvanic isolator will prevent any electrolytic current. However, if there is a (higher) error voltage in the AC circuit, the diodes will allow current through and the residual-current device will break the circuit.<\/p>\n<p>Energy Solutions<\/p>\n<p>Website: <a href=\"http:\/\/energy-solutions.co.uk\" target=\"_blank\">http:\/\/energy-solutions.co.uk<\/a><\/p>\n<p>ES Online Store: <a href=\"http:\/\/www.es-store.co.uk\" target=\"_blank\">http:\/\/www.es-store.co.uk<\/a><\/p>\n<p>Facebook: <a href=\"https:\/\/www.facebook.com\/EnergySolutionsUK\" target=\"_blank\">https:\/\/www.facebook.com\/EnergySolutionsUK<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here is a short guest blog from Victron Energy distributor Energy Solutions, which I hope fellow sailors will find useful. In fact, when I was looking for a galvanic corrosion solution for my own boat I didn&#8217;t even realise Victron Energy made them! And on that note if you want a quick way to see [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":7792,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[126],"tags":[],"class_list":["post-7771","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-articles"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Protect your boat from galvanic corrosion - Victron Energy<\/title>\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.victronenergy.com\/blog\/2016\/10\/10\/protect-your-boat-from-galvanic-corrosion\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Protect your boat from galvanic corrosion - Victron Energy\" \/>\n<meta property=\"og:description\" content=\"Here is a short guest blog from Victron Energy distributor Energy Solutions, which I hope fellow sailors will find useful. In fact, when I was looking for a galvanic corrosion solution for my own boat I didn&#8217;t even realise Victron Energy made them! 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In fact, when I was looking for a galvanic corrosion solution for my own boat I didn\u2019t even realise Victron Energy made them! And on that note if you want a quick way to see [\u2026]","subtitle":null,"related_posts":[{"id":26623,"slug":"new-vrm-solar-production-forecast-feature","title":"Introducing Solar Production Forecast","link":"https:\/\/www.victronenergy.com\/blog\/2023\/07\/05\/new-vrm-solar-production-forecast-feature\/","excerpt":"We are excited to announce the launch of a new feature for VRM - Solar Forecasts. This feature combines a model of your sites solar production potential with irradiance forecasting data from Solcasts global fleet of weather satellites.\u00a0 [video width=\"1280\" height=\"720\" mp4=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2023\/07\/solcast_232349675.mp4\" poster=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2023\/07\/solcast_232349811.jpg\" loop=\"true\" autoplay=\"true\" preload=\"auto\"][\/video] The Solcast network provides 600 million new irradiance forecasts&hellip;","featured_image":"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2023\/07\/solar-estimate-overview_232350203-150x150.png","author_name":"Guy Stewart","author_link":"https:\/\/www.victronenergy.com\/blog\/author\/guystewart\/","author_avatar":{"24":"https:\/\/secure.gravatar.com\/avatar\/46f1d045a4e399c7c754f765b33d48ca13b2ff31beca5a200d86e7c1d7b8d6d5?s=96&d=mm&r=g&s=24","48":"https:\/\/secure.gravatar.com\/avatar\/46f1d045a4e399c7c754f765b33d48ca13b2ff31beca5a200d86e7c1d7b8d6d5?s=96&d=mm&r=g&s=48","96":"https:\/\/secure.gravatar.com\/avatar\/46f1d045a4e399c7c754f765b33d48ca13b2ff31beca5a200d86e7c1d7b8d6d5?s=96&d=mm&r=g&s=96"},"categories":[{"name":"News","link":"https:\/\/www.victronenergy.com\/blog\/category\/news\/"},{"name":"Technical articles","link":"https:\/\/www.victronenergy.com\/blog\/category\/technical-articles\/"}],"date":"2023-07-05T14:03:29+02:00","date_gmt":"2023-07-05T12:03:29+00:00"},{"id":22392,"slug":"teaching-renewables-in-croatia","title":"Teaching Renewables in Croatia","link":"https:\/\/www.victronenergy.com\/blog\/2021\/03\/23\/teaching-renewables-in-croatia\/","excerpt":"Right across central Europe Schrack Technik\u00a0provide energy solutions to industry, home and the Electric Vehicle market. They educate customers about the advantages of Solar - and also provide demonstration mobile energy installations for the classroom. In this article\u00a0Josip Zdenkovi\u0107 (PH.D \/ M.Sc. 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