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As a metal corrodes, what happens to oxygen?
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As a metal corrodes, what happens to oxygen?

User Chamika Goonetilaka
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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
User Meuk Light
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