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The corrosion of aluminum is prevented by the formation of impervious surface coating of

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a
AIN 
b
Al(OH)3
c
Al2CO33
d
Al2O3

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detailed solution

Correct option is D

Aluminum coatings are more resistant to corrosion in the atmosphere than zinc coatings. The formation of an Al2O3 layer affords protection to the base metals. A film of hydrated aluminum sulfate is formed which is protective.

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