Question

Which of the following ions, that can reduce pitting corrosion?

(a) Hydroxide salts

(b) Chromate salts

(c) Silicate salts

(d) Hydroxide, chromate and silicate salts

This question was posed to me by my college director while I was bunking the class.

I'm obligated to ask this question of Eight Forms topic in portion Eight Forms of Corrosion of Corrosion Engineering

Answer 1

The correct option is (d) Hydroxide, chromate and silicate salts

To explain I would say: Pitting is one of the most destructive and insidious forms of corrosion. The tendency of pitting can be increased with the presence of chloride, bromide, and hypochlorites. But this tendency can be prevented or minimized with the presence of hydroxide, chromate, and silicate salts.