CSEC Chemistry · May/June 2015 · Paper 1 · Question Q58
Although aluminium is more reactive than iron, aluminium becomes corrosion resistant when left exposed to the atmosphere while iron corrodes. This is because the
- (A)aluminium has reacted completely
- (B)iron oxide formed is more reactive than the aluminium oxide formed
- (C)oxide film on aluminium protects the metal from further corrosion but the oxide film on iron does not
- (D)iron oxide reacts with the iron below the surface but the aluminium oxide does not react with the aluminium below the surface
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