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-----Gold Plating using Cyanide Solution
Q. Hi everyone .. I need urgent help on this hope someone can help me out or point me to some quick online resources.
I need detail information regarding the ECD of gold using a solution of potassium gold cyanide, citric acid
⇦ on
eBay
or
Amazon [affil link] and KOH.
I have been looking for the half equations for the cathode and anode reaction but didn't manage to find any. Hope someone can help me out of this.
Also, I would appreciate if someone could tell me the purpose of using of citric acid and KOH in this case.
Regards,
Sunny
Student - Singapore
2006
by Reid & Goldie
-- hard to find & expensive; if you see a copy cheap, act fast!
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or AbeBooks
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A. I don't believe gold baths have both citric acid and KOH in them; I believe it's either/or: citric acid for acid gold cyanide or potassium hydroxide for alkaline gold cyanide. The citric acid both buffers the bath and complexes the base metals for deposition in a controlled manner; I believe the KOH is just for pH control.
Although the half equation at the cathode can be expressed as simply as Au+ e- --> Au 0, gold plating is actually quite complex, and you may want to consult Gold Plating Technology ⇨
by Reid and Goldie to really understand the reactions.
Ted Mooney, P.E.
Striving to live Aloha
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A. Try next web page www.pfonline.com/articles/079702.html ⇩ (very good and short article on different gold plating baths). Good luck and hope it helps!
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