[Amps] tarnish or corrosion?

[Charles Harpole]

I have a hot and humid year round weather.  I have lots of problems with
some kind of material that gets on exposed plugs and sockets that
interferes with electric conduction.
That is, plugs normally kept in their sockets stop conducting.

The small plug/sockets between boards inside the Alpha 87a are a real
example--as is my use of Cinch Jones plugs/sockets on a patch panel for
rotors.  Other plugs too, same problem.

These plugs use metal and somehow they lose good conduction either in
constant "plugged in" state or "in and out."

Because these type of plugs have a "wiping action," I can fix the problem
by plugging in several times.  Then they conduct fine.

Question:  There is no sign of real corrosion and no pitting nor change in
the metal, so what is cause of this problem?

The metal looks ok or perhaps tarnished.  What is tarnish and how is it
different from corrosion?  Web is vague.

Tnx 73, Charly






Charly, HS0ZCW