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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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RoHS and zinc plated hardware

Are you saying (ref. letter 36234) that Zinc Plated washers and retaining rings are compliant? I thought my vendor said they were not.

Susan Hotkowski
- Old Saybrook, Connecticut, USA
2006

First of two simultaneous responses --

It's not the Zinc but the chromate that is at issue.
It is the chromate. Hexavalent chromates on zinc or aluminum would not be considered RoHS compliant.

Bill Grayson
metal finishing - San Jose, California, USA
2006

Second of two simultaneous responses --

Zinc plated anything which has a trivalent conversion coating or non chrome coating is generally compliant. Ask your vendor to certify that parts are RoHS compliant.

Gene Packman
process supplier - Great Neck, New York
2006

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