Question

Can Aluminium be rusted?

Answer 1

We know that corrosion is a natural phenomenon that transforms a refined material into a more chemically stable form, such as its oxide, hydroxide or sulphide. It is an immediate destruction of material (generally metals) by chemical and/or electrochemical reaction with their environment.

Complete answer:
Corrosion and rusting are the chemical processes which occur in the surface of the metal when it is exposed to its natural environment. When a metal comes to the exposure of air, water and moisture, over a time period it starts degenerating and breaks into small particles. This process is known as corrosion. When the metal is exposed to an external environment, it gets oxidized by the oxygen in the environment.
A metal in which corrosion takes place behaves like either cathode or anode. The exposed metal releases electrons to the oxygen and behaves like anode. Rusted iron gets removed and shed off, so the lower surface comes in direct contact with the environment and that results in further corrosion. Corrosion is simply meant to form a layer of metal oxide on the surface. Also, aluminium cannot be rusted. This is because rust is iron oxide, and we know that aluminium does not have iron in its composition.
Therefore, aluminium cannot be rusted.

Note:
Remember that the metals begin to corrode when it reacts with other substances such as oxygen, hydrogen, an electric current, or even bacteria’s or dirt. Corrosion can also take place when metals such as steel are occupied under so much stress compelling materials to crack.