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topic 3230

Chromate conversion coating on zinc plated steel


Hello: Does adding a chromate conversion coating to a zinc plated steel enclosure will interfere with the enclosure's EMI protection? I am familiar with ASTM B633 [link by ed. to spec at TechStreet] , but the spec. does not describe the EMI effects of adding a chromate conversion coating. Thank you Matt Wise

Matt Wise
- Germantown, Maryland

I've never heard that it has any effect, and don't think it does.

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey
Striving to live "Aloha"


Hi Matt ,

All the people that I know that plate Enclosures for electronic equipment , yellow chromate treat the Zinc Plating and have never had any problems , but for other reasons a lot of them are now switching (no pun intended) to semi - bright Nickel plating

Best regards

John Tenison-Woods
John Tenison - Woods
- Victoria Australia

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