Letter 32041

Can you anodize zinc?  

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We are producing a part which is an aluminum extrusion, Alloy #6005-T5. We want to change to a Zinc, or Zinc aluminum casting. What type of plating can we now use to replace the gold anodizing we were doing?

Donald Cyr
Blackstone Industries Inc. - Bethel, CT, USA

Although zinc can be anodized it is not really a commercial process and it's not for decorative effect. Yellow chromated on zinc will look reasonably like gold anodizing but certainly not a good color match. If you don't need conductivity, maybe electrophoretic lacquering would give you the appearance you want.

Ted Mooney, P.E.  finishing.com Brick, New Jersey

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