I stumbled upon the following article while trying to identify some old RAM modules:
In the article, it mentions the following about gold contacts:
A note about contact metals
Chip contacts are either gold- or tin-plated. I recommend chips with gold contacts because they don’t corrode. Also, never insert tin-plated chips into gold-plated sockets. Different metals will increase the likelihood of corrosion.
I don't understand how gold cannot corrode on it's own, yet cause another dissimilar metal such as tin to corrode. Is this article correct?