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Post Treatment passivation of Zn-Fe-Al alloy

2004

Dear Sirs,

Can anyone help me with information about passivation substances for a surface that consists of two alloys. First alloy 90% Zn and 10 % Fe (more likely less Fe) and second 90% Zn and 10 % Al. The two alloys are both at the outermost surface. The parts have to be passivated, without any specific demand of colour. Any colour with dark appearance would be appreciated.

Elke Langenbach
hegas - Kreuztal, Germany

I think that conventional chromate conversion coating in gold, olive, or black might meet your needs. Depending on the application, though, RoHS compliance issues are possible.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004

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