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Rear bumper falling off because of dissimilar metals 900

posted by  walrus3 on  Wed Oct 1 11:41 CST 2008
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last visit: Mon Dec 2 14:20 CST 2013
[RELATED]

If you are in a damp or damp/salty environment this can be a severe problem.
Part of the cure is to make sure that the two metals are electrically insulated
from each other - well enough that an ohmmeter shows way up in the megohms or infinite resistance between them. Rubber or plastic gaskets between them (and around and under bolts and nuts) will accomplish this. It will be kind of a pain in the backside to do this but it will help arrest the corrosion and keep it from getting worse.

We had a maintenance crew attach a sign to an aluminum fence at the Fort Sherman (Toro Point) Breakwater with monel wire. The aluminum wire corroded through and the sign (and part of the fence) was on the ground in less than two weeks. It was pretty expensive to repair, made MUCH worse by the crew using carbon steel at first. Finally had to replace the whole fence.
--
George Downs, Bartlesville, Heart of the USA!






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