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Oxidation on Zinc alloys

2005

I have a problem of oxidation of zinc die cast components. Before plating we have to do buffing as the components have white layer of oxidation.

can any body please suggest me:

1. Chemical treatment for removal of oxidised layer.

2. any coating to avoid oxidation.

Atul Gupta
PA Time Industries - Dharampur, Solan, HP India

I'm not sure if I understood the question properly, Atul, but buffing (or at least some degree of mechanical polishing or vibratory finishing) is required for plating of zinc die castings. I don't think there is a chemical dip that will alleviate the requirement.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2005

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