Evaluation of the resistance of corrosion-proof steels to corrosion cracking in hydrogen sulfide solutions

We study the tendency of corrosion-proof steels of the martensitic, martensite-ferritic, austenitic, austenite-martensitic, and ferrite-austenitic classes to corrosion cracking in hydrogen-sulfide-containing media. We have established that austenitic chromium-nickel-molybdenum (08Kh17N15M13T and 10Kh17N13M2T) and ferrite-austenitic (12Kh21N5T and 02Kh22N6AM3 steels are the most resistant to fracture: the threshold stresses in NACE solution (5% NaCl solution + 0.5% CH3 COOH saturated with H2S, 20±2°C, pH ∼ 3) are not less than 90% of the yield point.