On Mon, 04 Jul 2005 07:13:28 GMT, "NSM" wrote:


"Jim Yanik" . wrote in message
. ..

IIRC,the OP wanted to clean off a PCB's tarnish.
I'd like to see you use your diamond file on a PCB for tarnish removal.

But the topic drifted to "hi current contacts"

For PCBs I'd use an acid.

N


They used to make something called "board washer" or something like
that. An aerosol spray that cleaned gunk and removed tarnish from
entire circuit boards. My old man had a can or two of it way back when
he had an electronics repair shop.
I seem to remember a similar spay cleaner during my Navy days in
avionics corrosion control, though it came in a unmarked green can
with just a mil spec number.
There are plenty of copper cleaners on the market that might give the
desired results with a little care and an acid brush or q-tip.
Never Dull might be the best bet. It's cotton balls that are doped
with a copper cleaning solvent. Can be gotten at any hardware or
marine supply shop. Should be safe for any of the components and
they're water free.