On Wed, 20 Jul 2011 16:44:31 -0400, "Josepi"
wrote:

Contacts do **NOT** corrode. Contacts may tarnish being made from copper,
brass, silver and gold.

Spraying it on electrical equipment to displace does not mean into the
conductors. When you have water in your electrical conductors you have a
bigger problem.

---------------
"Zz Yzx" wrote in message
.. .

http://en.wikipedia.org/wiki/Wd40

Sheesh guys.

WD40 was invented to displace water and prevent corrosion of
electrical contacts. It has no to none lubricitive properties.

-TES
Many contacts DO corrode, depending on the environment.
Brass sure can corrode - so can copper.
However,arcing, and the associated transfer of metal, is a more
serious problem - even with contacts of tungsten or platinum. (look at
a set of ignition points that have been in service for an extended
period of time in a standard "kettering" type system)