Question

Which of the following is/are correct when oxidizing agents are added to a corrosion system containing a non-passivating metal?

(a) Rate of corrosion decreases after certain potential

(b) Rate of corrosion increases with increase in oxidizers concentration

(c) Rate of corrosion increases after certain potential

(d) Results in the formation stable oxide layer

I had been asked this question in an online interview.

My question comes from Modern Theory Applications topic in division Modern Theory Applications of Corrosion Engineering

Answer 1

Correct option is (b) Rate of corrosion increases with increase in oxidizers concentration

To elaborate: The rate of corrosion increases with increase as the concentration of oxidizing agents containing non-passivating metal. It is due to the reduction of oxygen on the surface of the metal and due to the absence of an oxide layer.