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! 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)
Iron generally corrodes faster because the oxide layer (rust) does not seal the metal's surface from oxygen like the corrosion on copper does.
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How to Join Copper Pipes