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Zn plating RoHS compliance

Zn plating with yellow passivation is treated as RoHS non compliant process where as Zn plating with Blue passivation is accepted for ROHS.
I would like to know the reason behind this.

Anand Risbud
Philips Electronics India Ltd - Pune, India
2007

You'll need to post the actual details of your situation rather than vague references to it to get a good answer, Anand, but hexavalent chromium is non compliant and some chromate conversion processes use hexavalent chromate. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
(Ted can offer longterm or instant help)
finishing.com - Pine Beach, New Jersey
2007

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