Question

How is corrosion useful for some of the metals?

Answer 1

Heya!!

Here is your answer:-

❇️ Corrosion of metals is harmful as it destroys the metals but in the case of aluminium, it is useful as when aluminium gets corroded, the corrodedlayer acts as a protective layer which protects aluminium.

Hope... It... Helps... You...❤️❤️

Answer 2

Corrosion is helpful for some metals like Aluminium.

Corrosion makes a protective thin layer. These layers are formed when the metal is exposed to air. The layer is of its metal oxide. It prevents that metal from further atmospheric corrosion. You can remove this layer later and it can gain it's lustre again.