Question

explain one advantage where corrosion is an advantage.

Answer 1

Advantage of corrosion: In some metals like Aluminium corrosion forms a deposit of metal oxide on the surface. This protects metal from further degradation and hence is the advantageous.

Answer 2

Explain one advantage where corrosion is an advantage.

[1] Surface corrosion forms an oxide layer which further protects the inner metal form corrosion.

[2] Some metals like zinc are used as sacrificial anodes to prevent corrosion to other metal.

[3] The principle on which primary batteries work.

In which one metal corrodes preferentially to another when both metals are in electrical contact, in the presence of an electrolyte.