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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 Alfieri1996
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
(Ted can offer longterm or instant help)
finishing.com - Pine Beach, New Jersey
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