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Copper Anodes Darken

Sir,

In my rochelle copper plating, copper anodes are covered with dark maroon (blackish) deposits. After completing process these deposits disappear and anodes leaves white colour. Please help me to tell about any deficiency in my solution.

Thank You.

Ajay Aggarwal
Aggarwal Steels. - Panchkula, Haryana, India.

Dear Ajay,

You have a Sodium Cyanide deficiency. Or too large a cathode area causing yr anodes to polarise when worked.

Khozem Vahaanwala
Saify Ind

Bengaluru, Karnataka, India

How often do you use this bath?

Michael Brewington
- Salisbury, Maryland, USA

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