模拟油气田环境中HP13Cr和N80油管钢的CO2腐蚀行为
CO2 Corrosion Behavior of HP13Cr and N80 Steels in Simulated Oil and Gas Field Environment
摘 要
采用电化学方法研究了HP13Cr和N80油管钢在含饱和CO2的NaCl溶液中的腐蚀行为, 结果表明, HP13Cr钢自腐蚀电位较N80钢低, 自腐蚀电流密度较N80钢高; 与N80钢相比, HP13Cr钢极化曲线的循环滞后环面积小, 点蚀发生的程度低; HP13Cr钢的极化电阻高于N80钢的极化电阻, 说明HP13Cr抗CO2腐蚀能力强; 当HP13Cr与N80组成电偶对时, 两者的电偶电位均较其自腐蚀电位负移, 且因电偶电流较大而不能偶接使用。
极化电阻
电化学阻抗谱
电偶腐蚀
corrosion potential
polarization resistance
electrochemical impedance spectroscopy
galvanic corrosion
Abstract
The corrosion behaviors of HP13Cr and N80 steels in NaCl solution containing carbon dioxide were investigated by electrochemical methods. The results showed that the corrosion potential of HP13Cr steel was lower than that of N80 steel and the corrosion current density was higher than that of N80 steel. The area of the cycle hysteresis loop in the polarization curves of HP13Cr steel was smaller than that of N80 steel, and indicated a lower propagation degree of pitting corrosion of HP13Cr. The resistance to CO2 corrosion of HP13Cr steel was stronger than that of N80 steel because of the higher polarization resistance. Moreover, due to the high galvanic current, the galvanic couple of HP13Cr and N80 steels should be avoided.
中图分类号 TG172
所属栏目 试验研究
基金项目 CNPC材料力学与环境行为重点试验室开放基金
收稿日期 2010/6/7
修改稿日期 2010/6/28
网络出版日期
作者单位点击查看
备注要玉宏, 讲师,
引用该论文: YAO Yu-hong,LIU Jiang-nan,WANG Zheng-pin,JIN Yao-hua,BAI Zhen-quan. CO2 Corrosion Behavior of HP13Cr and N80 Steels in Simulated Oil and Gas Field Environment[J]. Corrosion & Protection, 2011, 32(5): 352
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参考文献
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【3】田昭武. 电化学研究方法[M]. 北京:科学出版社, 1984.
【4】HB5374287. 不同金属电偶腐蚀电流测定方法[S].
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