NON-CYANIDE BRASS PLATING BATH
Can you recommend a cyanide free brass plating bath replacement?
Q. Our shop currently uses a cyanide-based brass plating bath. We would like to replace it with a non-cyanide-based plating bath. Can you recommend a cyanide free replacement? A.C.
A. As far as I know there is no commercial alkaline non-cyanide brass plating bath available. However, I am aware of one report in the plating literature of a non-cyanide brass plating bath.
I do not have any additional information about this plating bath, but you might try experimenting with the formulation that follows. If you try it please let me know how (or if) it works.
Component | Concentration |
| Copper sulfate | 5–10 g/L |
| Zinc oxide | 0.3–1 g/L |
| Sodium hydroxide | 60–100 g/L |
| Glycolic acid | 5–20 ml/L |
| Operating Conditions | Range |
| Current density | 10–12 ASF |
| Additives | Gelatin at a concentration of 0.5 g/L recommended for a smoother deposit. |
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