Re: Carbonates treatment for silver cyanide solutions
I remember a conversation with my good friend Dr. Kushner where he said something along the lines of the fact that these potassium carbonates can be removed from your silver bath by treating it with any of the following chemicals: calcium nitrate, barium cyanide, calcium sulfate, calcium hydroxide, calcium cyanide. As far as the actual procedure goes, maybe one of the other members here can help with that.
I would suggest, that as you would with any other plating tank changes, you test this with a small sample before you go at the tank, and make sure you have a proper analysis before you do anything. And also don’t forget to look for what is causing this problem so you can attempt to minimize it in the future. A couple of places that you can look at towards minimizing it in the future would include to not using a return dragout tank, and maintaining a tank temp of 70F, fine silver anodes, and by bagging your anodes.