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Write a long answer to the following questions in few words or sentence.
The oxidation of iron to rust is a problem, but the oxidation of aluminium to aluminium oxide is not why?
Iron oxidizes in the presence of atmospheric oxygen and water to form , known as rust. It peels off, exposing fresh iron surface for further rusting. While, aluminium oxidized in the presence of atmospheric oxygen to form a thin, transparent and non-water-soluble layer of , which shield the metal from further and maintains its metallic shine. Hence, the oxidation of iron to rust is a problem for structural engineers, but aluminium oxide is not.
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