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Added Cyanide Zinc Brightener to Acid Zinc; now the parts are black

November 5, 2012

Q. Guys I have done a mistake by adding Cyanide-Zinc Brightener into Acid-Zinc Bath.
After that I have been getting black color on the plated parts.
Kindly Suggest the remedy ASAP

Parin Sheth
- Umbergaon, Gujarat, India

A. Try to plate out.
If you have a hull cell, take a look where do you observe the black deposit, at high or low current density.
According to that you can decide how to perform the plating out.

Sara Michaeli
Tel-Aviv-Yafo, Israel
November 7, 2012

November 12, 2012

Ma'am thanks so much for the advice.
Q. We were trying it out with 8V-10V but still finding black on whole body of the part.

Please help!

Parin Sheth
- Umbergaon, Gujarat

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