Abstract
We show that tensile stresses close to the yield limit and small strains (up to 5 %) facilitate an increase in the density of grain-boundary dislocations in sensitized austenitic steels 03Kh18N11, 08Kh18N10T, and 12Kh18N10T, create favorable conditions for repassivation of grain boundaries, and accelerate the intergranular corrosion (IC) of these steels in 50 % and 65 % solutions of nitric acid. The changes in the activation energy caused by stresses and strains indicate kinetic control of the dissolution of steel grain boundaries. This means that, in manufacturing and maintenance of stainless steel equipment used in nitric acid production, it is necessary to avoid stress concentration and reduce the IC susceptibility of the steels.
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