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topic 2930

Brown stains in nickel plating


In our nickel plating, because we don't want to plate nickel on glass, (the part base are Kovar), we add more stablizer, and control the Lead at 0.4ppm-0.6ppm, recently we always find brown stain on the part after nickel plating, can not remove by washing... who can tell me what is the problem? thanks

Cindy Xu

I'll bet it's rust, Ms. Xu, and that your electroless nickel is not thick enough and your drying/displacement system is not functioning adequately.

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

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