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You are right on the corrosion problem with copper foil, especially the thinner stuff sold by WM. I installed 50 feet of foil under my floor boards and around the bilge two years ago and many places are corroded right through not to mention that the bilge is stained green. Has anyone thought of using tin plated copper foil. I don't know where you find it but I would think this would be ideal in and around salt water. Short of finding tin plated copper are there other ways to deal with the corrosion of the foil?
You can paint the foils - they do not have to be bare. You can also encapsulate them in epoxy or polyester resin.

A bronze through-hull is ok, but a bronze grounding plate is better. Size it for your electric power budget, not for lighting protection. You can't size properly for lightning protection unless your entire hull is made of copper. =)

Best Regards,

e

.::.
 
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