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Change plating zinc cyanide into acid

I have an alkaline zinc plating plating bath. It contains zinc oxide [affil links] and NaCn. Now I want to change the alkaline plating into acid zinc plating solution because it's very dangerous. Can any body help me about my problem? And I hope you give me formulas/recipes/solutions about acid zinc plating.

thanks a lot.

Yuono
- Indonesia
2004

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Yuono

Please find a supplier who will sell you a zinc chloride or a Non cyanide alkaline cyanide free bath. The zinc Chloride bath is acidic and has good speed for barrel plating. The alkline cyanide free bath has good throw and uniform thickness in the recesses.

Both systems are available in Jakarta. Both need very good cleaning and pretreatment.

Good luck.

Asif Nurie [deceased]
- New Delhi, India
With deep regret we sadly advise that Asif passed away on Jan 24, 2016
2004

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Dear Youno,

You are an inspiration to us all! May your tribe increase! Regards

Khozem Vahaanwala
Saify Ind

Bengaluru, Karnataka, India

2004

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Attached is my response to question 28609.

Cyanide has been used since the early days of electroplating. Its primary function is to control the concentration (activity) of metal ions. This is essential to control the rate of ionic discharge and hence the quality of the deposit. Sodium hydroxide is present in cyanide processes to maintain alkaline conditions and prevent release of hydrogen cyanide. For a comprehensive discussion I suggest you contact the institute of Metal finishing www.ukfinishing@dialpipex.com . I recently published a paper 'Cyanide in Metal Finishing, Risks and Alternatives' in Transactions which should answer some of your environmental concern don't rush to change from a well well established process with some hazards to a new one until you have investigated ALL the unknowns of the new one.

Geoff Smith
Hampshire, England
2004