|Joined: ||Mon Oct 12th, 2009|
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|On my boat the Sacrificial Zinc Anode is 20 years old. It shows some pock marks (which only increase if surface area and efficiency). Like your watercraft D, my boat is primarily in freshwater and raised clear of the water in it lift when not in use.
Galvanize is a coating and will mitigate any electrolysis. If any it will be where the bolt holes expose the bare steel. Stainless bolt would also reduce the impact, but outrageously expensive. I buy stainless hardware every year when the narine is closing for winter, 35% off everything! Zinc coated bolts (Home Depot) are cheap (not marine quality) and in your application might be all you need.