Question

Which of the following are the reasons that make it difficult to detect pits?

(a) Small size

(b) Varying depths

(c) Pits covered with corrosion products

(d) Small size, varying depths and covered with corrosion products

The question was posed to me in my homework.

This is a very interesting question from Eight Forms topic in section Eight Forms of Corrosion of Corrosion Engineering

Answer 1

The correct option is (d) Small size, varying depths and covered with corrosion products

To explain: It is difficult to measure the pitting quantitatively because of its small size, varying depth, and due to covered corrosion products. It fails the equipment because of perforation over the entire surface with only a small percent weight loss.