katy7852
katy7852
17-06-2017
Chemistry
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As a metal corrodes, what happens to oxygen?
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dec77cat
dec77cat
17-06-2017
Oxygen is reduced. For example, corrosion of iron occurs according to the scheme:
4Fe + 3O₂⁰ + 6H₂O = 4Fe(O⁻²H)₃
O₂ + 2H₂O + 4e⁻ = 4OH⁻
Fe - 3e⁻ = Fe⁺³
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