采用U型弯曲试样研究了固溶及敏化奥氏体不锈钢SUS316和SUS316L在四种不同的含Cl-的饱和H2S水溶液中的应力腐蚀开裂（SCC）行为。研究结果表明Cl-的加入和pH值的降低会增大实验钢种的应力腐蚀敏感性，而微量的Na2CO3则可降低其SCC敏感性。
Stress corrosion cracking(SCC) sensibility of austentic stainless steels SUS 316L in H2Ssaturated aqueous solution containing Cl- or CO32- was investigated by U bend samples. Addition of Cl- and reduction of solution pH intensified the SCC susceptibility of these two steels. But it was decreased obviously when adding 0.001mol/L Na2CO3 into the aq ueous solution especially for SUS316. Intergranular corrosion sensibility of SUS 316 was increased after sensitization heat treatment, and its SCC resistance got worse. However, SUS 316L exhibited remarkable immunity to sensitization. The SCC cracking morphology and the mechanism were also discussed.
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