Externet Posted November 26, 2006 Share Posted November 26, 2006 Hello. Does molten Sn attack 24K gold? Just had my electronics soldering iron tip jacketed in 0.5mm pure gold and eroded in a minute at 800ºF! (There is a chance it was a poorly done job by the goldsmith) What other metals will get wet with 96.5% tin solder and not degrade with oxides, corrosion, staying tinned ? Ag, Pt, Ti,...? Miguel Link to comment Share on other sites More sharing options...
jdurg Posted November 26, 2006 Share Posted November 26, 2006 Did you have any type of flux going with your soldering? Fluxes typically contain some type of chloride or fluoride salt which will readily attack gold at higher temperatures. Link to comment Share on other sites More sharing options...
YT2095 Posted November 26, 2006 Share Posted November 26, 2006 yeah, I think it`s most likely as Jdurg says, as for other metals you`ll be able to solder Silver with it and I beleive Pt can be soldered to also, but not Ti. Link to comment Share on other sites More sharing options...
woelen Posted November 26, 2006 Share Posted November 26, 2006 I know from recent experience that Pt is wetted by molten tin and also dissolves in it. So, I can perfectly imagine that gold dissolves in tin. Link to comment Share on other sites More sharing options...
Externet Posted November 27, 2006 Author Share Posted November 27, 2006 Thanks, fellows. The flux formula is from Kester, and they only reveal being a "modified resin". If Sn has affinity for Au, would explain the fast erosion. I would have no problen in trying Pt but if dissolves as gold there is no point on increasing my frustration. It is plain Sn unleaded solder for electronics, and canot discern what material for the soldering iron tip could handle it without degradation. Suggestions on what to use ? Miguel Link to comment Share on other sites More sharing options...
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