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Metal finishing Q&As since 1989

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Give me a RoHS compliant treatment for brass

2006

Hello,

I would like to replace the current treatment we are using of Chromate conversion DEF-Std-03-12/1 on Brass materials, since it is not approved for RoHS (hexavalent chromium).

Can you please help me to find such treatment process that is approved for ROHS.

Thanks in advance,

Eli Avitan
Ceragon networks - Israel

2006

According to old ex-USSR books copper and copper alloys can be phosphated:zinc phosphate....113 gm
NaClO3(sodium chlorate)...40 gm
water.............9 lit
You must use boiling solution. Good luck and hope it helps!

Goran Budija
- Cerovski vrh Croatia

According to literature I have read, several of the trivalent chromate conversion coatings for aluminum are also applicable on other surfaces including brass, copper, etc.

You might want to investigate these

Gene Packman
process supplier - Great Neck, New York
2006

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