Summary for mazak conversion coating Discussion
Conversion coating for Mazak is the central question here: S. Vishnuram Lucas-TVS asks for a treatment for zinc-based alloy parts that can prevent white rust for up to 240 hours. The excerpted thread also includes an older related question from Chetan Shetty, who says his company chromates machined aluminium alloy (ADC12) and zinc alloy (Mazak) parts with hexavalent chromium, but customers are asking for trivalent chromium because of environmental concerns. In the available text, no answer is shown, so there is no confirmed process recommendation or performance claim. The discussion mainly establishes the need for a corrosion-resistant conversion coating on Mazak and raises the hexavalent-versus-trivalent chromating choice as the key technical issue.
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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
May 24, 2022
⇩ Similar, related, Q&As — oldest first ⇩
Q. We are an automobile ancillary manufacturing fuel management parts made of aluminium alloy (ADC12) 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
2004