Question

Which of the following characteristics of the crevice is a must to act as a corrosion site?

(a) It should be wide enough to permit liquid entry

(b) It should be narrow enough to maintain a stagnant zone

(c) It should be wide enough to avoid a stagnant zone

(d) It should be wide enough to permit liquid entry and narrow enough to maintain a stagnant zone

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

I need to ask this question from Eight Forms topic in portion Eight Forms of Corrosion of Corrosion Engineering

Answer 1

Right choice is (d) It should be wide enough to permit liquid entry and narrow enough to maintain a stagnant zone

For explanation I would say: Crevice is a small volume region formed between the interface of metal and gaskets. It acts as a corrosion site if is wide enough to permit liquid entry and narrow enough to maintain a stagnant zone.