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"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? thanksCindy 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, P.E.
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finishing.com - Pine Beach, New Jersey