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Curated with aloha by
Ted Mooney, P.E. RET

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Black RoHS conversion coating for aluminum

2006

Does anyone know if there is a good, Black, (non hexavalent) RoHS compliant, conversion coating for aluminum? Does it look as good as the hexavalent coating? how expensive?

What about black anodize? Would this be a good alternate finish to propose to our customer, Providing customer doesn't require any electrical continuity?

thanks,

Jack McCraw

Ed. note: This RFQ is outdated, but technical replies are welcome, and readers are encouraged to post their own RFQs. But no public commercial suggestions please ( huh? why?).

Hi Jack. All such chromate conversion coatings are proprietary, Jack. Hopefully the vendors who feel they have a good one will contact you privately. Some vendors claim they have one while others say good ones don't exist. In many ways black anodizing is a superior finish, so if there is no circumstance that prevents its use, fine.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
September 2013

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