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Zinc chromate plating ASTM B633 type 3

My customer requested zinc chromate plating ASTM B633 type 3 on aluminium. Is it possible to plate on aluminum or is it anodising?

Tan CT
precision lathing - Malaysia
2005

It's not extremely common but, yes, aluminum can be zinc plated.

. . . which makes me curious! I wonder if it can be reliably electroplated directly from an alkaline zinc plating bath without bothering to use a separate zincating bath first?

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2005

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