Originally Posted by NWRVR
If anti-seize is used it should be zinc based anti-seize with no copper content according to the builder of my aluminium jet boat. Loctite product number 39901 is zinc based and will minimize galvanic corrosion.
Also, I would not use zinc plated washers or any zinc plated fasteners because the zinc acts as a sacrificial anode and after a few years the underlying carbon steel will come into contact with the aluminium resulting in corrosion.
All these products minimize galvanic corrosion--that's what we're talking about here. I personally don't buy your jet boat builder's no copper story since original Permatex has been used on aluminum in the saltwater/aluminum boating industry, with no problems, long before Locktite ever produced an anti seize product. That said, if one is afraid of copper, use a copper free product. Heck, use the food safe stuff if you want, just use Stainless and some anti seize--done deal.
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