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Galvanic action between stainless steel pin fixing to an aluminum window restictor
2006
The head of the stainless steel pin has shown corrosion (rust) within weeks of been fitted.
Window manufacturer is proposing to apply an aluminum paint to cover the pin.
Is this acceptable?
DEREK SQUIRE
I think it would harm nothing and is acceptable, but it may not be the best answer. Aluminum is theoretically anodic to stainless steel and should not cause galvanic corrosion to the stainless steel, but all corrosion is not necessarily caused by galvanic incompatibility. These pins probably should have been passivated to deter rust.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.
2006
Another option would be to electroplate the SST pin with a pure aluminum coating to eliminate dissimilar metal issues.
Gus Vallejo
2006
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