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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»

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%



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