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Need black plating resistant to 8% KOH

Q. Hi,

I need a black plating process for either stainless, aluminum or steel plates which will become part of a fixture, which will dipped many times for extended periods (approx. 20 min)
in KOH (potassium hydroxide 8%). The plating needs to hold up to the caustic solution indefinitely.
Can someone offer suggestions??

Thanks

steve diprinzio
sigma - tucson, Arizona USA
October 11, 2017

A. Hi Steve. There are probably black precious metal platings which would be completely resistant, but they may be economically prohibitive. I would think that black electroless nickel plating might serve your needs, and it can be applied to any of those substrates. Must it be a metal plating rather than a powder coating or plastisol?

Regards,

Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
October 2017

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