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Boat House
Small Paint blisters growing under high end factory paint,
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<blockquote data-quote="DaleH" data-source="post: 436702" data-attributes="member: 15636"><p>In the picture the OP posted, that corrosion is due to the stainless steel bolt bearing against the aluminum. SS against tin sets up a galvanic corrosion via a mild electrical current that is formed. Happens all the time on aluminum bodied fishing reels put together w/ SS bolts.</p><p></p><p>You need to insulate those SS bolts from the tin. Their is a goop, Tef-Gel that the military uses or the simpler DIY 'Dale' method of adhesive-lined heatshrink on the fastener threads and nylon washers under the bolt heads and under the nylok nuts. </p><p></p><p>I always grease the threads w/ a good marine waterproof synthetic marine grease before adding heatshrink. If not a load bearing part, you can put a nylok nut up against a thick nylon washer, but if load bearing, add a SS washer. In my well distant past I once just used duct tape to insulate SS from direct contsct w/ tin.</p></blockquote><p></p>
[QUOTE="DaleH, post: 436702, member: 15636"] In the picture the OP posted, that corrosion is due to the stainless steel bolt bearing against the aluminum. SS against tin sets up a galvanic corrosion via a mild electrical current that is formed. Happens all the time on aluminum bodied fishing reels put together w/ SS bolts. You need to insulate those SS bolts from the tin. Their is a goop, Tef-Gel that the military uses or the simpler DIY 'Dale' method of adhesive-lined heatshrink on the fastener threads and nylon washers under the bolt heads and under the nylok nuts. I always grease the threads w/ a good marine waterproof synthetic marine grease before adding heatshrink. If not a load bearing part, you can put a nylok nut up against a thick nylon washer, but if load bearing, add a SS washer. In my well distant past I once just used duct tape to insulate SS from direct contsct w/ tin. [/QUOTE]
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Boat House
Small Paint blisters growing under high end factory paint,
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