Tony Bugeja asked:
>
>Does anyone have information on soldering silver terminals. We currently use
>RMA 615-25 flux an we are getting tarnishing/oxidation when hand or wave
>soldered.  I looks like the silver is being vaporized off and the brass
>below is showing through, the plating thickness is .0003".  Is this a
>process problem or is it a vendor problem?

Vaporized? Not likely, especially 7 microns. Oxidized? Much more probably.

Silver oxides are highly conductive. It might not matter whether you have
"tarnishing" from a functional view.

Your last question implies that it IS a problem. I am not sure that the
presence of an oxide on the surface of a metal is a problem. If it is, we
are all in trouble.


cheers,


Jerry Cupples
Interphase Corporation
Dallas, TX USA
http://www.iphase.com/

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