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How to obtain grey passivate on zinc plating

2000

Dear sir,

How to control color of black passivate in zinc with grey color not black finish?

Best regards

prasarn hutpattanasilp
LorYongSeng - Samutsakorn, Thailand

You can obtain a grey passivation on zinc electrodeposits by increasing the phosphate content of a green passivation.

Emmanuel Popesco
Regal - France
2000

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