Stress corrosion cracking behavior of buried oil and gas pipeline steel under the coexistence of magnetic field and sulfate-reducing bacteria  

作　　者：Jian-Yu He Fei Xie Dan Wang Guang-Xin Liu Ming Wu Yue Qin 

机构地区：[1]College of Petroleum Engineering,Liaoning Petrochemical University,Fushun,113001,Liaoning,China [2]Key Laboratory of Oil and Gas Storage and Transportation Technology in Liaoning Province,Fushun,113001,Liaoning,China [3]State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing,100084,China [4]PipeChina West East Gas Pipeline Company,Shanghai,200120,China

出　　处：《Petroleum Science》2024年第2期1320-1332,共13页石油科学（英文版）

基　　金：supported by the National Science Foundation of China(Grant numbers 52274062);Natural Science Foundation of Liaoning Province(Grant numbers 2022-MS-362)。

摘　　要：Magnetic field and microorganisms are important factors influencing the stress corrosion cracking(SCC)of buried oil and gas pipelines. Once SCC occurs in buried pipelines, it will cause serious hazards to the soil environment. The SCC behavior of X80 pipeline steel under the magnetic field and sulfate-reducing bacteria(SRB) environment was investigated by immersion tests, electrochemical tests, and slow strain rate tensile(SSRT) tests. The results showed that the corrosion and SCC sensitivity of X80 steel decreased with increasing the magnetic field strength in the sterile environment. The SCC sensitivity was higher in the biotic environment inoculated with SRB, but it also decreased with increasing magnetic field strength, which was due to the magnetic field reduces microbial activity and promotes the formation of dense film layer. This work provided theoretical guidance on the prevention of SCC in pipeline steel under magnetic field and SRB coexistence.

关 键 词：Magnetic field Sulfate-reducing bacteria Film layer Stress corrosion cracking Oil and gas pipelines 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]