Technetters, my apologies for asking this question again. It has been 2 years since I asked, and I remember getting some good responses, but digging through the archives I can't find them. My memory of their content has gotten quite vague. I can only presume that the responses came directly to me, and I lost them.

What chemical species are removed from a 63/37 tin-lead molten bath when the film or coating on the top surface is skimmed off? I had the theory that, along with some oxide(s) of tin, oxide(s) of copper would be removed. I'm thinking of wave solder baths. The long-term result would be elemental copper would reach some stable concentration in the bath, which concentration based on my limited data appeared to be about  0.23% by weight.

And does gold, as an element, simply sink to the bottom of the bath?

Louis Hart
Compunetics
Monroeville, PA
USA
[log in to unmask]<mailto:[log in to unmask]>
412-858-1232


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