不同温度下X80钢的CO2腐蚀电化学特性
Electrochemical Characteristics of CO2 Induced Corrosion of X80 at Different Temperatures
摘 要
采用动电位扫描和交流阻抗技术研究了常压条件下X80钢CO2腐蚀电化学特性。结果表明: 在30～80 ℃范围内, 阳极反应机理没有发生变化, 而阴极反应机理在60 ℃时已经发生改变; 在阳极极化条件下, X80钢CO2腐蚀的电化学阻抗谱(EIS)曲线具有三个时间常数, 其中低频感抗弧与试样表面活化溶解有关, 低频容抗弧与试样表面腐蚀产物膜生成有关; 随着温度的升高, EIS曲线低频区感抗弧逐渐缩小, 容抗弧逐渐扩大。
温度
电化学阻抗谱
X80钢
CO2 corrosion
temperature
electrochemical impedance spectroscopy(EIS)
X80 steel
Abstract
The electrochemical characteristics of CO2 induced corrosion of X80 steel were studied by means of the measurements of EIS and potentialdynamic polarization. The results showed that the mechanism of X80 did not change in the temperature range of 30 ℃~80 ℃, while the cathodic reaction mechanism of X80 changed at 60 ℃. EIS presented three time-loops, in which at low frequency the inductive arc was related with the surface activation dissolution of steel and the capacitive arc was related with the formation of corrosion film. With the increase of the temperature, the inductive arc reduced and capacitive arc expanded.
中图分类号 TG172.6
所属栏目 试验研究
基金项目 国家科技支撑计划项目(2006BAB03B05)“复杂油藏高效开发模式”
收稿日期 2011/2/2
修改稿日期
网络出版日期
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备注魏爱军, 高级工程师,
引用该论文: WEI Ai-jun,ZHAO Qian,HUO Fu-yong,TIAN Guang. Electrochemical Characteristics of CO2 Induced Corrosion of X80 at Different Temperatures[J]. Corrosion & Protection, 2012, 33(4): 281
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参考文献
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【3】李士伦, 郭平, 王仲林. 中低渗透油藏注气提高采收率理论及应用[M]. 北京: 石油工业出版社, 2007.
【4】Mclntire G, Lippert J, Yudelson J. The effect of dissolved CO2 and O2 on the corrosion of iron[J]. Corrosion, 1990, 46(2): 91-95.
【5】Kermani M B, Morshed A. Carbon dioxide corrosion in oil and gas production-A compendium[J]. Corrosion, 2003, 59(8): 659-683.
【6】Nesic S, Postlet hwaite J, Olsen S. An elect rochemical model for prediction of corrosion of mild steel in aqueous carbon dioxide solutions[J]. Corrosion, 1996, 52(4): 280-294.
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【8】Videm K, Kvarekvl. Corrosion of carbon steel in carbon dioxide-saturated solutions containing small amounts of hydrogen sulfide[J]. Corrosion, 1995, 51(4):260-269.
【9】曹楚南, 张鉴清. 电化学阻抗谱导论[M]. 北京:科技出版社, 2002:185.
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