Question

Which of the following is/are the effects of filiform corrosion?

(a) Weakens the metal

(b) Decreases tensile strength

(c) Affects surface appearance

(d) Weakens the metal, decreases tensile strength and affects the surface appearance

I have been asked this question during an online exam.

Query is from Eight Forms topic in chapter Eight Forms of Corrosion of Corrosion Engineering

Answer 1

Correct option is (c) Affects surface appearance

Best explanation: This filiform corrosion affects only surface appearance on metal-coated food and beverage cans that are exposed to the high humid atmosphere. It doesn’t weaken the metal as well as decreases the tensile strength.