Question

Aluminium is more than iron and zinc , yet its corrosion is less than these bntwo metals

Answer 1

Aluminum reacts with air (oxygen) which makes a thin layer of aluminum oxide which provides the resistance from corrosion reaction of aluminum with oxygen :

4Al + 3O2 - - - - > 2AlO3

Whereas the iron and zinc do not form oxide layer on there surface so it donot have protection layer from corrosion.

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