Question

What are the preventions of filiform corrosion?

(a) Use of coatings with low water permeability

(b) To store in low-humidity environment

(c) To store in high-humidity environment

(d) Use of coatings with low water permeability and to store in a low-humidity environment

The question was posed to me in final exam.

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

Answer 1

The correct choice is (d) Use of coatings with low water permeability and to store in a low-humidity environment

The best explanation: Filiform corrosion is a special type of crevice corrosion, occurs under metal coatings in a relatively high-humidity environment

Preventions to filiform corrosion:

i. Use of coatings with low water permeability

ii. To store in a low-humidity environment

iii. Use of brittle films or coatings