L360MCS钢在普光气田凝析水中的腐蚀行为
Corrosion Behavior of L360MCS Steel in Condensed Water in Puguang Gas-field
摘 要
采用循环伏安、动电位极化曲线、电化学阻抗谱等方法研究了L360MCS管线钢在普光气田凝析水中的腐蚀行为。结果表明，随着腐蚀时间的延长，腐蚀极化电阻减小，腐蚀电位降低，腐蚀电流密度增大; L360MCS钢在普光集输系统中不能形成保护性的腐蚀产物膜。焊缝的基体区、热影响区和焊缝区的腐蚀速率差异明显，有发生沟槽腐蚀的可能性。
管线钢
H2S腐蚀
电化学
氢
highly sour natural gas field
pipeline steel
H2S corrosion
electrochemistry
hydrogen
Abstract
Cyclic voltammetry, potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS) were used to investigate the corrosion behavior of L360MCS pipeline steel in condensed water of Puguang gas-field. The results showed that the polarization resistance decreased with increasing corrosion time. At the same time, the corrosion current density increased and corrosion potential decreased. EIS indicated that there was no protective corrosion product film formed. The corrosion rate showed a significant difference between the base, HAZ and weld, which would lead to grooving corrosion.
中图分类号 TG172
所属栏目 试验研究
基金项目 中国博士后科学基金(2011M501193);河南省博士后科研启动基金(2010044)
收稿日期 2013/4/19
修改稿日期
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联系人作者陈惟国(Pgcwg@163.com)
备注陈惟国(1963-),教授级高工,博士,从事油田采油工程技术相关研究,
引用该论文: CHEN Wei-guo,ZHANG Qing-sheng,LIU De-xu,ZHANG Cheng,LI Chang-jin,ZENG De-zhi,SU Yan-jing. Corrosion Behavior of L360MCS Steel in Condensed Water in Puguang Gas-field[J]. Corrosion & Protection, 2014, 35(2): 137
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参考文献
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