The answer: electrolysis. electrolysis occurs any time you pass an electric current through water, and when two dissimilar metals are immersed in this water. the electric current can come from anything from faulty wiring in your own or your neighbor's boat or an electrical box that isn't fully insulated.. Welding a new keel onto a 16 foot johnboat. electrolysis damage destroyed the center strake of this boat, causing it to take on water. after this repair it will be like new.. I have an aluminum boat that has some electroylsis damage showing up in the bottom of the boat. would like information on how to stop and repair this problem..
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. their high strength-to. Re: electrolysis of aluminum boats go for the zinc. there won't be much electrolysis in fresh water anyway, unless you're in a hot marina, in which case the zinc should work ok for that. i have a fiberglass boat in a sort-of-hot marina, and an ob. the original motor zincs were zinc, and when they were used up, i switched to magnesium.. A simple test to check for hull errrosion / corrosion and galvanic issues - also stray current checks..
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