A nail with zinc attached. Notice how there are no blue spots to indicate the rusting of iron. However the pink areas indicate that oxygen is taking electrons from somewhere.

Where are the electrons for the oxygen coming from?

The pink area is located around the copper. Iron is losing electrons from either side.

How is the copper effecting the lose of electrons from the iron?

A bent nail shows distinct areas of electron loss from the iron and electron gain from the oxygen.

What effect does a bend in the iron have on its ability to rust? Can you explain why?

An untreated nail left to rust.

What can you say about the areas of electron give and electron take?