I would like to be able to understand what you wrote a little bit better but I don't understand all the terminology related to metals. You said: "Pitting was the result." What exactly is pitting?
Pitting is a type of corrosion that in this case happens because of the very high temperature of the electrical arc (see below) that happens when shorting occurs.
Also: "There is not a real solution when arc happens." What is an arc?
I think he meant electrical arc which happens when there is current high enough to breakdown gas which makes it possible for current to pass through a non conductive area in this case the gap between the button post and the battery post.
Just my
