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Aluminum is more reactive than iron is, but iron corrodes more quickly. This occurs because aluminum is reduced in the presence of oxygen while iron is oxidized. aluminum develops a coating of aluminum oxide, which protects it from further reaction. iron has a lower density than aluminum does. iron is exposed to both oxygen and water, while aluminum is rarely exposed to water.

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Answer:aluminum develops a coating of aluminum oxide,

Explanation:

Aluminium has an electrode potential value of -1.66V while iron has an electrode potential value of -0.44V for iron II and +0.77 V for iron III. Clearly, aluminum has a more negative value of electrode potential and ought to be more reactive. However, a protective coating formed on aluminium surface prevents corrosion of the metal.

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