摘要
针对目前高含H2S和CO2油气田开发中的油套管严重腐蚀问题,通过动电位扫描、扫描电镜(SEM)分析腐蚀产物膜等手段,研究了在高含H2S和CO2腐蚀环境中,CO2、pH值、Cl-等不同因素对镍基合金G3腐蚀行为的影响。结果表明:Cl-不利于G3钝化膜的形成,且使腐蚀加剧;CO2的加入促进了G3的腐蚀,pH值的增加使G3的自腐蚀电位出现较大负移,并影响了腐蚀产物膜的稳定性。
Aimed at the problem of oil tube corrosion in oil and gas exploitation in environment with high content of H2S and CO2, the influences of CO2, pH, Cl- on corrosion behavior of nickel-based alloy G3 were studied by potentiodynamic scanning, scanning electron microscope（SEM）. The results show that Cl- is harm for the passive film of G3 and accelerates the corrosion, adding CO2 to the corrosion environment with H2S accelerates the corrosion, the corrosion potential decreases and the stability of the corrosion scale reduces with the increase ofpH.
出处
《热加工工艺》
CSCD
北大核心
2009年第6期29-31,34,共4页
Hot Working Technology
基金
油气藏地质及开发工程国家重点实验室(西南石油大学)资助项目(PLN0609)
