Aluminum is more reactive than iron,yet it is used today for a variety of applications in which iron would corrode (cans,rain gutters,etc.).The reason for the corrosion durability of aluminum is that
A)aluminum does not react with oxygen.
B)very unreactive aluminum oxide forms a thin layer on aluminum.
C)aluminum does not undergo oxidation.
D)all aluminum products are treated with a plastic coating.

Question

Quizplus · Accepted Answer

The correct answer is B because when aluminum comes into contact with oxygen, it forms a very thin layer of aluminum oxide on the surface. This layer acts as a barrier between the aluminum and the environment, preventing further corrosion. This process is known as passivation, and it makes aluminum much more resistant to corrosion than iron.

Aluminum Is More Reactive Than Iron,yet It Is Used Today