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topic 4958

Bright Cobalt Plating


Anyone could tell the bath formula for a Bright Cobalt plating. It is used to substitute the Bright Nickel plating. Any books talking the cobalt plating can be suggested ?

Deville Yiu
- Hong Kong, China


Dear Mr Yiu,

I think you are referring to tin - cobalt plating done over Nickel plating to give a near chrome like look. It is not a replacement for Nickel. You should contact your nearest Enthone dealer for the chemistry. Regards

Khozem Vahaanwala
Khozem Vahaanwala
Saify Ind supporting advertiser
Bangalore, Karnataka, India

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Nickel and cobalt are very nearly the same. Cobalt is slightly harder, slightly more magnetic, quite a bit whiter, same atomic weight and valence and etc. Any bath that you can find for bright nickel, you can substitute the same amount of a cobalt salt for as in cobalt sulfate for nickel sulfate.

Cobalt is quite a bit more expensive at the current time. Cobalt can be used in jewelry, avoiding the frequent prohibition of "no nickel". It is also unregulated, the last I knew, by EPA.

James Watts
- Navarre, Florida

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