Copper doesn't corrode it is one of the precious metals tht are found in its metallic state Oh, yes it does, i did a science experiment on it, and it corroded, who ever wrote this is...
yes a copper penny can corrode but it takes a long time for it to do so
YES! It does so very quickly.
When copper corrodes it turns green.
No, however, if copper pipe is going to be chased into the wall and plastered over, you need to use the highest graded copper. (class 2 or 3)