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Letter 12090
Zinc nickel on a grey iron substrate
???
Anybody knows if it would be possible to apply a zinc nickel
coating in a grey iron component, for instance a brake caliper.
Alfonso Bustos Garcia
- Valladolid
The question, I believe, is about the hydrogen overvoltage of the
carbon particles in the cast iron. In zinc cyanide and probably
alkaline non-cyanide zinc, the overvoltage is low, so hydrogen is
reduced on the metal instead of zinc metal.
Practical acid zinc plating solutions solved this problem. So I
suppose that an acid zinc-nickel solution would be all right. I don't
have a reference for this, so please check in with an answer if you
have one.
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question on a different subject.
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