I took apart a broken water cooler and the copper tubing through which I assume coolant runs is covered with green and there‘s green powder everywhere. I am wondering if there was a coolant leak and this could be from dried up coolant, or are these copper precipitates? In any case, there is lots of green all over the pipes.
Copper turns green as it oxidizes. Look at the Statue of Liberty.
No, these are not from coolant leaks. They are probably mold that grows because the coolant tubing sweats and has moisture on it most of the time. Copper also gets a weathered green look over time but primarily, what you are seeing is mold.
The green stuff is copper carbonate. Basically, copper rust (patina is the correct term for it) I wouldn't put it on my eggs at breakfast, but, it's basically harmless
