Investigation of Mechanical Property of Oil Tube Steel P110S in High Temperature and High Pressure Environment Containing H2S/CO2

摘要：

With the exploitation of high sour and deep oil well in china, the corrosion medium containing CO2, H2S, Cl-and organic acid threaten the safety of oil equipment and tube steel severely. In this article, many experiments, including corrosion tests, tensile tests, hydrogen concentration measurement tests and SEM examinations, were performed to investigate the effect of H2S partial pressure and loading stress on the mechanical property of oil tube steel P110S in high temperature and high pressure environment containing H2S/CO2. The tensile strength and yield strength during fracture process of P110S steel were obtained experimentally and the fracture morphology was analyzed by SEM. The results indicate that both tensile strength and yield strength decreased after corrosion. The damage of tensile strength and yield strength became serious with an increase in H2S partial pressure and loading stress. According to the fracture analysis, the fracture mode exhibited quasi-cleavage and dimple mixed fracture, and the area of quasi-cleavage pattern increased with H2S partial pressure and loading stress increasing. According to the results of tensile test and hydrogen concentration measurement test, the tensile property degradation is closely associated with diffusible hydrogen concentration of P110S steel in the H2S/CO2 environment.

关键词： metallic tension P110S diffusible hydrogen H2S/CO2 corrosion

作者: LI Xiao-dong QI Ya-meng CHEN Chang-feng DONG Xiu-cheng

作者单位: School of Business Administration, China University of Petroleum(Beijing), Changping District, Fuxue College of Science, China University of Petroleum(Beijing), Changping District, Fuxue Road 18＃, Beij

会议类型: 国际会议

会议名称: The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)

会议地点: 北京

会议语种:英文

页码: 909-914

在线出版日期: 2011-05-31（万方平台首次上网日期，不代表论文的发表时间）