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Copper has oxidized to black color

Q. Hello,

I'm working with copper substrate for electronic application, I found different level and color of oxidation. Could you help me to understand the oxidation with black color and how I can remove, reduce, this oxidation ?

Thanks
Valeriano

Valeriano Cardi
research - Rome, Italy
January 21, 2009

"The Chemistry of Benzotriazole Derivatives"

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A. Hi, Valeriano. You haven't given us any details to work with, but black oxidation may be a reaction with sulfides, and copper oxidation can be slowed with benzotriazole ⇦ on eBay or Amazon [affil link] or chromates. Good luck.

Regards,

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