Question

Name one element in which corrosion is not proved to be wasteful

Explain

Answer 1

The thin (generally invisible) layer of aluminum oxide corrosion on aluminum protects the aluminum from further corrosion. It will even allow aluminum to resist nitric acid because nitric acid is a very strong oxidizer that actually strengthens the corrosion coating. Other acids dissolve aluminum easily because they also dissolve aluminum oxide.

:)

Answer 2

Hey mate here is your answer

Zinc and Aluminium are such metals ..... This is because their oxides form a layer over metals surface and are not flaky or powdery. So don't get removed easily and protected the inner layer ... hence the corrosion is not proved to be wasteful .

Hope it helps u