[Amps] tarnish or corrosion?

[LB2HG]

   Or Acid free vaseline ?
73 
Harald, LB2HG ex LA6LHA
US callsign AA4NX


Visit my region: [1]http://www.visitalesund-geiranger.com/en/

   On 23.04.2017 14.44, [2]n8de at thepoint.net wrote:

     Have you ever thought of putting petroleum jelly on the contacts to
     prevent the moist air from getting to the metal?  Worth a try!
     73
     Don
     N8DE
     Quoting Charles Harpole [3]<hs0zcw at gmail.com>:

     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
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References

   1. http://www.visitalesund-geiranger.com/en/
   2. mailto:n8de at thepoint.net
   3. mailto:hs0zcw at gmail.com
   4. mailto:Amps at contesting.com
   5. http://lists.contesting.com/mailman/listinfo/amps
   6. mailto:Amps at contesting.com
   7. http://lists.contesting.com/mailman/listinfo/amps