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topic 3230

Chromate conversion coating on zinc plated steel


(1999)

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, finishing.com Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey


(1999)

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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