Question

why does aluminium not undergoes corrosion but iron does?​

Answer 1

Hello mate :)

$\huge{\underline{\sf\purple{AnsweR}}}$

Aluminum doesn't undergoes corrosion because it has a layer of aluminium oxide which protects the surface from corroding. While Iron rusts when it come in the contact of oxygen & water.

$\large{\underline{\rm\red{Explanation:}}}$

• Aluminum react with oxygen of air and form a layer called aluminium oxide. It forms when metal is exposed to air and prevent further oxidation. It is known as protective passivation.

• Iron is more reactive than aluminium.

• Aluminum is a least reactive metal.

• Corrosion is a natural process in which refined metal is converted into more stable form as oxide, hydroxide...this leads to deterioration of the material.