Protecting aluminum boats from salt water corrosion boating magazine in 2012, boaters bought 77,150 aluminum boats. they’re light, economical, nearly maintenance-free, easy to repair and almost impervious to damage. the coast guard and navy prefer them for small craft, and many commercial boats are aluminum, as are many recreational craft. (2004) a. corrosion is a pretty normal phenomena that doesn't necessarily require electrolysis (galvanic corrosion). i'd paint the transom with either a metal-free aluminum priming paint or, if you can buy it, an organo tin paint, tbt (this is truly biohostile stuff, and is allowed only on aluminum if at all).. Galvanic corrosion is caused by the flow of electric current set up when dissimilar metals are in electrical contact with an electrolyte such as seawater. this current flows from one metal to the other through the seawater and returns through a metallic circuit or any other electrical conductor that may exist between metals..
Boat trailer corrosion. boat trailers are constantly dipped in and out of water (and sometimes even worse - saltwater). exposing metal parts to both water and oxygen mean that corrosion is inevitable without protection.. Galvanic corrosion is excluded from our warranty as well as the warranty of most aluminum boats so it pays you to be educated on the subject. with proper care you should be able to avoid the effects of galvanic corrosion.. Trailer manufacturers know that when using two dissimilar metals, precautions need to be taken to prevent two-metal (galvanic) corrosion. that applies even to the “all-aluminum” design, which uses steel frames in the axle and coupler areas..
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