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Removal of Chemical Conversion Coating from ZAMAC

Hi there, I'm trying to remove a conversion coating (CrVI-free) from Zamac. So far I have used caustic degreaser, but either the CCC wasn't removed properly or the Zamac was affected negatively as when I did another conversion coating on the same piece, the corrosion protection was very low.
I hope any of you has a good idea.

Philipp Ebner
product manager - Vienna, Austria
July 12, 2011

Zinc is highly sensitive to caustics and most acids in any appreciable concentration. If your chemical suppliers cannot help you with specific CC strippers maybe sand or glass bead blasting could do the job.
Guillermo Marrufo-Mexico

Guillermo Marrufo
Monterrey, NL, Mexico
July 19, 2011

adv.
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