Wow, just a post 1982 cent coin that has had part of the coating damaged and the underlying zinc decomposed. Zinc rot. Welcome to CT
First, welcome to the neighborhood! I usually refer to all Lincoln cents that are produced mid-1982 to date as Crappy Zincolns because this is what can happen to them when they are exposed to the environment. By the way, there are no dumb questions, only dumb answers. ~ Chris