Zinc and aluminium are very high in metal reactivity series ,yet they resist corrosion to a great extent . Why?
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Zinc and aluminium are very high in metal reactivity series ,yet they resist corrosion to a great extent . Why?
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but the oxides of aluminium and zinc are reactive.
when iron is coated with zinc or aluminium which may react with oxygen, water vapour so they form their respective oxides which are non reactive and hence cover iron and does not allow it to corrode.