EFFECT OF H2S PARTIAL PRESSURE ON MECHANICAL PROPERTIES OF OIL TUBE STEEL
With the exploitation of high sour and deep oil well in China, the corrosion medium containing CO2.H2S.C1- and organic acid threaten to the safety of oil equipment and tube steel severely .In this article, solution immersion environments containing H2S/CO2 were simulated in a high temperature and high pressure autoclave respectively. The effect of H2S partial pressure on mechanical properties of oil tube steel was investigated and analyzed by the test technologies of tensile and impact.SEM and diffusible hydro-gen.And the mechanism related was disscussed primarily. The results show that H2S has a significant impact on mechanical properties degradation of oil tube steel.The performance index of tensile strength,yield strength and impact toughness decreased at different degree with the addition of H2S.The performance index became more lower with the increasement of H2S partial pressure.The SEM cross section micrographs of tensile specimens indicated that many pimple characteristics which represent toughness fracture exhibit after pure CO2corrosion.However,many river pattern and feather pattern characteristics which represent brittle fracture appeared and the pimple characteristics decreased with the addition of H2S.The results of diffusible hydrogen show that the content of diffusible hydrogen increased with the increasement of H2S partial pressure.which indicated that the hydrogen generated from H2S corrosion have a significant impact on mechanical properties degradation of oil tube steel.
H2S/CO2 corrosion oil tube steel-,mechcnical properties high tempenture and high pressure diffusible hydrogen
Qian Jinsen Chen Changfeng Zheng Shuqi
Department of Materials Science and Engineering,China University of Petroleum (Beijing),Beijing,Chan Department of Materials Science and Engineering,China University of Petroleum (Beijing),Beijing,Chan
国际会议
The 3rd World Conference on Safety of Oil and Gas Industry(第三届世界石油天然气工业安全会议 WCOGI 2010)
北京
英文
677-681
2010-09-27（万方平台首次上网日期，不代表论文的发表时间）