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Galvanic action between carbon and stainless steel





2003

I would like to know about the expected galvanic action between stainless steel (304)and carbon steel in a corrosive environment, within a few hundred yards from the coast. The application would be stainless steel bolts and screws to galvanized carbon steel. What would you suggest to use as a fastener if stainless were not acceptable? Cadmium coated bolts with dielectric washers has been suggested however I think that it would be overkill. Bolt manufacturers are saying that cadmium coating is becoming obsolete.

Kenneth Paquette
BRPH - Cocoa Beach, Florida, USA



2003

Galvanized hardware would be best. Cadmium is not actually becoming obsolete, it's becoming used only on applications that really need it, and it would offer nothing special in this application if galvanized hardware can be used instead.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey


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