中文摘要：

阀值应力， σc 为七管道钢和五另外的钢的裂开的硫化物应力腐蚀( SCC )，批评应力， Sc 为有到 SCC 的各种各样的力量和危险性的七管道钢和二练习杆钢， IRA 或 σf ( SCC )/ σf ，为四管道钢，二钻杆钢，五另外的钢被测量。结果证明在与在 H2S04 答案装载收费期间在 σc ， Sc 和 IRA 或为氢的阀值应力导致了裂开的 σf ( SCC )/ σf .The ( HlC )之中没有明确的关系， σc (H)，与可散开的氢 c0 的集中的对数线性地减少了，即，为四管道钢的 σc (H) =A-B Inco 。与特殊阴极的水流 ic 获得的σ c (H) ，在在 H2S 答案沉浸期间相应于可散开的氢集中，与为为四管道钢的硫化物 SCC 的 /c 一致。因此，为硫化物 SCC 的σ c 能用动态地与特殊阴极的水流 ic 在 H2SO4 答案收费被测量。

英文摘要：

The threshold stress, σc, for sulfide stress corrosion cracking (SCC) of seven pipeline steels and five other steels, the critical stress, Sc, for seven pipeline steels and two drill rod steels with various strengths and the susceptibility to SCC, IRA or σf(SCC)/σf, for four pipeline steels, two drill rod steels and five other steels were measured. The results showed that there are no definite relationships among σc, Sc and IRA or σf(SCC)/σf.The threshold stress for hydrogen induced cracking (HlC) during charging with loading in the H2S04 solution, σc(H), decreased linearly with logarithm of the concentration of diffusible hydrogen c0, i.e., σc(H)=A-B Inco for four pipeline steels. σc(H) obtained with a special cathodic current ic, which was corresponding to the diffusible hydrogen concentration during immersing in the H2S solution, were consistent with /c for sulfide SCC for four pipeline steels. Therefore, σc for sulfide SCC can be measured using dynamically charging in the H2SO4 solution with the special cathodic current ic.