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Conversion Coating Process (Chromating?) for Mazak (Zamak)

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Zamak

May 24, 2022

Q. Sir,

Kindly suggest any conversion coating for zinc based alloy (Mazak component). No white rust should be noticed up to 240 hours.

S Vishnuram
Lucas-TVS, Engineer - Chennai, India
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Closely related Q&A's, oldest first:

2004

Q. We are an automobile ancillary manufacturing fuel management parts made of aluminium alloy (ADC-12) and zinc alloy (Mazak). We chromate our machined parts with hexavalent chromium for surface treatment purposes. However now we have heard from our customers that trivalent chromium is a better option than hexavalent chromium from the environmental aspect. Kindly let us know of the process of trivalent chromating.

Chetan Shetty
automobile ancillary - Pondicherry, India
^

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