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Copper-Silver intermetallic layer

On matte silver plating over nickel, I believe I may be picking up some copper contamination in my nickel strike and co-depositing copper-nickel under my silver strike and plate. How would this appear visibly to the eye..red rust corrosion, staining. Are there any websites/ textbooks I should specifically refer to?

Nigel Gill
Advanced Technologist - Chemistry & Materilas - Glasgow, Scotland.
February 23, 2008

Impurities are most often plated out as black; without researching it, that's what I would suspect for copper contamination of nickel. But each chapter of the Canning Handbook covers the contaminants for that type of plating, both how to recognize them and how to deal with them. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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February 25, 2008

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