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topic 59026

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


November 7, 2012

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
Sara Michaeli sara michaeli signature
chemical process supplier
Tel-Aviv, Israel



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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