Question

for which metal corrosion is considered as a useful phenomenon. why?​

Answer 1

Answer:

Aluminium

Explanation:

Aluminium prevents corrosion because it gives advantage for the formation of oxide layer  When aluminium metal kept in open air, then a thin oxide layer forms on its surface which prevents further corrosion of the metal.

Hope it helps u !!

Answer 2

$\huge \tt Aluminium$