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Muffler - Walker hanger not the right fit? 900 1997

posted by  B.B. on  Sat Jun 15 13:41 CST 2024
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last visit: Mon Oct 6 13:15 CST 2014
[RELATED]

Hi Alex,

>I don't see why a stainless steel bracket would be problematic.

Unlike metals in contact can setup galvanic corrosion
See here for a number of interesting examples:

https://en.wikipedia.org/wiki/Galvanic_corrosion

It's easy to understand salty road electrolyte driving in the salt belt.

Rain water is also an electrolyte. My local ham radio friend put up
some Rohn 25 (hot dipped galvanized steel) tower and was proud to
say that he used all Stainless bolts and nuts. I'm not sure how many
years it took, perhaps 20, but the tower failed because the zinc disappeared around the stainless hardware and the steel rusted out. He should have used
Hot dipped galvanized steel bolts & nuts sold by Rohn.

I've seen certain car bodies that rusted out where the body panels joined.
Is that galvanic corrosion? maybe the panels are the same metal, and the
welding rod is a much different metal? It's hard to say where the electyolyte is in this case. Maybe galvanic corrosion can take place without a traditional electrolyte?

Have you noticed what happens to steel screws/spark plugs into aluminum heads?
Is the resultant mess galvanic corrosion? where's the electrolyte?
Whatever it is, I use nickel based anti-seize there.

I wonder if anyone tried hot dip galvanizing a muffler and pipes?

Bill





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