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Blisters and bubbles in zinc and yellow

Why blisters/bubbles are formed in yellow passivated zinc plated surfaces?How the problem can be arrested Clarify..

Ravi janardanan
- Chennai,TamilNadu, India
2000

With out more information it's hard to tell.

Your problem might be delayed blisters, these appear when there is an excess of additives and / or bad preparation (cleaning).

Carlos Cielak
plating shop - Mexico City, DF, Mexico
2001

Its been a few years since I was a plater , but I would suggest wet blast a few parts and try processing , if you get good results , your cleaning cycle is the likely culprit

Ron Landrette
plating equipment supplier - Bristol, Connecticut
2001

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