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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Powder coating won't stick to clear chromated zinc plating

I am looking for a electrically conductive plating to use over sheet steel that is also a good base for powder coat painting. We have had paint peeling problems when using zinc plate with clear chromate. Any suggestions will be appreciated.

Rich Alfieri
1996

Hi, Rich. I was involved in the refurbishment of Philadelphia's "William Penn" city hall tower. We tin-zinc plated, electrolytically chromated, and painted the steel; and we fully intend for it to last 100 years. So good adhesion of paint onto a chromate film is not an insurmountable problem, but it does require careful, very thin, chromating. Good luck.

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

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