Essential Chemistry for IGCSE - Metals And Reactivity (Section 1 - No. 32)

Why does aluminium not corrode easily, despite being a very reactive metal?
Because aluminium is unreactive.
Because a layer of aluminium oxide (Al2O3) protects it.
Because aluminium has a high melting point.
Because aluminium is not exposed to oxygen.

Explanation

Aluminium forms a protective oxide layer.

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