Question

oxygen of air attack iron as well as aluminium then why aluminium is considered better than iron for number of purposes

Answer 1

Answer:

because iron get rusting due to harmful air which r release from the factory and aluminum does not that is why iron is stronger than aluminum

Answer 2

This is because  

iron get rusted due to harmful air which is released from the factory smokes and aluminum does not get rusted .

That is why aluminum is considered  better than iron .