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Converting from Cyanide to Alkaline base on Zinc Plating
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Q. I'm in an industrial training, So the company want me to make an idea belong how to change the Cyanide that are using in Zinc Plating convert to Alkaline base?
Shah- Malaysia
2005
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A. If you are presently using a cyanide containing zinc bath you are using an ALKALINE CYANIDE bath. If you want to explore a non-cyanide alkaline bath these are widely used. However, it is generally not feasible to convert [do a sliding conversion] from cyanide to non-cyanide because of the extended time required until the cyanide is completely consumed in the process.
Gene Packmanprocess supplier - Great Neck, New York
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A. Mr. Packman, above, is 100% absolutely correct. I express the same thing this way: If you slide you will create more cyanide bearing sludge to haul away than if you just waste treat the whole CN bath and start from scratch with the Caustic & Zinc. I learned that years ago while involved in changing over a 40,000 gallon zinc solution. ![]() Robert H Probert Robert H Probert Technical Services ![]() Garner, North Carolina ![]() A. Mr Shah ![]() Asif Nurie [deceased] - New Delhi, India With deep regret we sadly advise that Asif passed away on Jan 24, 2016 |
A. Hi!
You can find some useful information on website pfonline.com in section "articles" in article #049702, or ⇩ Google it with text string "pfonline anatomy of a conversion"
Maybe this can be a little bit helpful.
Best regards!
- Kranj, Slovenija (EU)
Ed. note: Pfonline is re-arranged, but the googling works :-)
Indeed it is helpful, Dimitrij. It also suggests replacing cyanide with non-cyanide outright, not wih a sliding conversion.
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