The formation of a corrosion product wit tin-lead/gold requires some
environmental condition such as moisture or perhaps oxygen. I have examine
solder plug-ins to gold connectors after 3 years and saw no signs of fretting
or corrosion; however, the environment was dry and kept dry.  In other cases
the environmet was dry nitrogen and the connections looked exactly like they
they did when they were connected.

Phil Hinton 
[log in to unmask]