Answer
Corrosion is the oxidation of a metal to form a metal oxide.
Work Step by Step
Oxidation Half Reaction:
2Fe(s) $\rightarrow$ 2Fe$_2$+(aq) + 4e-
Reduction Half Reaction:
O$_2$(g) + 2H$_2$O(l) + 4e- $\rightarrow$ 4OH-(aq)
Reaction:
2Fe(s) + O$_2$(g) + 2H$_2$O(l) $\rightarrow$ 2Fe(OH)$_2$(s)
