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Ammonium chloride purpose in zinc plating

Hi,
I know this may be a basic question, but I really could not find "In ammonium chloride zinc electroplating bath, what does ammonium chloride do"?

Fatma Babacan
Engineer - Izmir, Turkey
February 18, 2011

February 18, 2011

Hi Fatma,

Ammonium chloride used to serve as conducting salt as well as pH buffer. For pH buffer, it works as below:

NH4(+) + OH(-) <=> NH3 + H2O
NH3 + H(+) <=> NH4(+)

Regards,
David

David Shiu
- Singapore

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