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Old September 29th 05, 04:51 PM
Posts: n/a

" bravely wrote to "All" (25 Sep 05 18:45:13)
--- on the heady topic of " Are these solder joints bad?"

st From: "
st Xref: core-easynews
st Rosin left on the circuit board will eventually corrode exposed metal,
st but it happens over a period of decades.

Acid flux will certainly corrode metal but rosin flux made for
electronics is pretty inert. I've seen older circuits with a lot of
residue rosin and they worked just fine.

The main problem I have experienced with rosin was in a high impedance
application because rosin will absorb and trap humidity thus lowering
circuit resistance. Perhaps this trapped humidity might explain the
corrosion you have seen on metal?


.... Who's got the Thermonuclear Welding Set? - ToddS