In article , Ed Huntress
says...

I'm not likely ever to encounter gold wire in my soldering experiences. g

Gold and lead form an intermetallic with a much lower
melting point than either of the two parent metals.
So as one begins to add in a bit of solder into the
joint, the gold wire simply sucks into the melt.

For making small connections with fine gold wires,
indium is a good solder to use. A new iron tip is
a must though!

Jim

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