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Need Nickel free and Cobalt free anthracite black on copper

I am working in a plating shop in Chennai, we need to supply nickel cobalt and heavy metal free anthracite black finsh on copper plated zinc base metal.Any body can suggest process.

Thyagarajan Umapathy
Employee - Chennai, Tamilnadu, India
May 8, 2008

Hi, Thyagarajan. Copper can be blackened without additional layers of electroplating.

But zinc and copper are already "heavy metals", the no. 1 and no. 2 heavy metal roadway pollutants, so what are you trying to do? To aggravate that problem by proscribing possibly good solutions like black nickel or black chrome plating wouldn't make much sense, so please try to flesh out what kind of components you are coating, why you are coating them, what environmental conditions they must resist, and why the possibly best solutions must be ruled out. Thanks!

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
May 8, 2008

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