Originally posted by /^Blackmagik^\
actually.. the more pure the copper is the easier it corrodes. pure copper reacts with oxygen making copper oxide, which is that green corrosion on copper. but yes. the size of the wire does make the biggest difference.
True...but you won't see a pure copper wire. However, it conducts current very fast and efficiently...hence why it's used in Pro Audio. Besides, a good wire is insulated to prevent oxidation on the strands anyways, which eliminate this problem from occuring to begin with.
Of course pure copper corrodes, haha.