plating, anodizing, & finishing Q&As since 1989
Black RoHS conversion coating for aluminum
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?
Ed. note: Sorry, this RFQ is outdated so private contact is no longer available, but public technical replies are still welcome! No public brand/source 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.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Q, A, or Comment on THIS thread -or- Start a NEW Thread