Question

What is meant by hydrogen embrittlement?

(a) Entrapment of hydrogen molecules in the metal voids

(b) Formation of brittle metal hydrides

(c) Entrapment of metal hydrides in the metal voids

(d) Entrapment of hydrogen molecules and metal hydrides in the metal voids

This question was addressed to me during an online exam.

My enquiry is from Eight Forms topic in section Eight Forms of Corrosion of Corrosion Engineering

Answer 1

Correct answer is (b) Formation of brittle metal hydrides

Explanation: Hydrogen embrittlement refers to the loss of ductility and strength of a metal due to the formation of brittle metal hydrides. Strong hydride forming metals such as titanium, results in brittle fracture.