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。
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 gasfield. 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.
出处
《腐蚀与防护》
CAS
北大核心
2014年第2期137-141,共5页
Corrosion & Protection
基金
中国博士后科学基金(2011M501193)
河南省博士后科研启动基金(2010044)
关键词
高酸性气田
管线钢
H2S腐蚀
电化学
氢
highly sour natural gas field
pipeline steel
H2 S corrosion
electrochemistry
hydrogen
