Question

Which of the following is an incorrect statement?

(a) Corrosion is an irreversible process

(b) Corrosion is a non-spontaneous process

(c) Corrosion is a degradation process

(d) Corrosion is a spontaneous process

This question was addressed to me in semester exam.

Question is taken from Corrosion and its Classification topic in portion Corrosion Principles of Corrosion Engineering

Answer 1

Correct answer is (b) Corrosion is a non-spontaneous process

The explanation is: Corrosion is a spontaneous process which results in degradation of materials and it is irreversible in nature. Spontaneous reaction is a reaction which results in the formation of stable products from unstable without need of any external energy.