摘要
采用U型弯曲试样研究了固溶及敏化奥氏体不锈钢SUS31 6和SUS31 6L在四种不同的含Cl- 的饱和H2 S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Na2 CO3则可降低其SCC敏感性。
Stress corrosion cracking (SCC) sensibility of austentic stainless steels SUS 316 and SUS 316L in H 2S saturated aqueous solution containing Cl - or CO 3 2- 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 aqueous 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.
出处
《中国腐蚀与防护学报》
CAS
CSCD
2000年第1期47-53,共7页
Journal of Chinese Society For Corrosion and Protection
关键词
奥氏体不锈钢
氢脆型
应力腐蚀升裂
毒化作用
Austenitic stainless steel
Stress corrosion cracking
Sensitization heat treatment
Intergranular corrosion
Morphology
