Letter 13088

Copper coating 

We are making components out of mild steel.We want to coat these components with copper.We've tried dipping them in copper sulfate [link is to product info at Amazon] solution and they are becoming coated but after a few minutes they tarnish. How could I prevent this from happening.

Orion
- South Africa

Immersion plating in copper sulphate solution produces an extremely thin coating which stops building as soon as the steel is very thinly coated. Robust copper coating requires electroplating from a cyanide or pyrophosphate plating bath.

 
Ted Mooney, P.E.
finishing.com Inc. - Brick, NJ

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