Question

Which of the following is/are the preventions of stress-corrosion cracking?

(a) Lowering working stress below the threshold value

(b) Shot peening to produce residual compressive stresses

(c) Applying for cathodic protection

(d) Lowering working stress below the threshold value, shot peening to produce residual compressive stresses and applying for cathodic protection

I had been asked this question during an interview.

The above asked question is from Eight Forms in division Eight Forms of Corrosion of Corrosion Engineering

Answer 1

The correct answer is (d) Lowering working stress below the threshold value, shot peening to produce residual compressive stresses and applying for cathodic protection

For explanation: Methods to prevent stress-corrosion cracking are:

i. Lowering working stress below the threshold value

ii. Shot peening to produce residual compressive stresses

iii. Applying cathodic protection to the structure

iv. Adding inhibitors to the system

v. Eliminating the critical environment species.