Question

Which of the following is/are the methods to control intergranular corrosion of austenitic stainless steel?

(a) Employing solution-quenching

(b) Adding stabilizers

(c) Lowering the carbon content to below 0.03%

(d) Employing solution-quenching, adding stabilizers and lowering the carbon content to below 0.03%

I had been asked this question in quiz.

This question is from Eight Forms topic in chapter Eight Forms of Corrosion of Corrosion Engineering

Answer 1

The correct option is (d) Employing solution-quenching, adding stabilizers and lowering the carbon content to below 0.03%

The explanation is: Austenitic stainless steels are highly prone to intergranular corrosion. It can be minimized by

                               i. Employing quench-annealing or solution-quenching

                              ii. Adding stabilizers that forms strong carbides

                              iii. Lowering the carbon content to below 0.03%