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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Flow Rate on the Corrosion Behavior of N80 Steel in Simulated Oil Field Environment Containing CO2 and HAc
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Effect of Flow Rate on the Corrosion Behavior of N80 Steel in Simulated Oil Field Environment Containing CO2 and HAc

机译：流速对含CO 2 和HAc的模拟油田环境中N80钢腐蚀行为的影响

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摘要

In most oil and gas fields, CO2 corrosion has become a significant problem plaguing the development of the oil industry. The usage of Acetic acid (HAc) as a common material in oil extraction increases the complexity of CO2 corrosion process. Among the many factors affecting the oil casing corrosion, the flow rate plays a decisive role. Therefore, in this work Wuhan Koster CS310 Electrochemical Station was used to measure the dynamic potential polarization curves and perform electrochemical impedance spectroscopy (EIS) at different concentrations of HAc and flow rates. Subsequently, the polarization curves were fitted to obtain the polarization characteristics, and corresponding equivalent circuits were chosen to fit the experimental EIS data. In the end, the corrosion behavior and corrosion mechanism of N80 steel were discussed based on corrosion electrochemical theory. It is concluded that the presence of HAc increases the self-corrosion potential Ecorr and self-corrosion current density Icorr of N80 steel in saturated CO2 solution, promotes the anodic and cathodic reaction speed, and reduces the thickness and the protective effect of the corrosion product film. Furthermore, it is observed that the flow rate increases the corrosion current density of N80 steel, increases the electric double layer capacitance CPE, reduces the charge transfer resistance Rt, and eventually accelerates the corrosion rate of steel.
机译：在大多数油气田中，CO2腐蚀已成为困扰石油工业发展的重大问题。乙酸（HAc）作为石油开采中的常用材料会增加CO2腐蚀过程的复杂性。在影响油套管腐蚀的众多因素中，流速起着决定性的作用。因此，在这项工作中，武汉科斯特CS310电化学站用于测量动态电势极化曲线，并在不同浓度的HAc和流速下进行电化学阻抗谱（EIS）。随后，拟合偏振曲线以获得偏振特性，并选择相应的等效电路以拟合实验EIS数据。最后，基于腐蚀电化学理论，探讨了N80钢的腐蚀行为和腐蚀机理。结论是，HAc的存在增加了N80钢在饱和CO2溶液中的自腐蚀电位Ecorr和自腐蚀电流密度Icorr，促进了阳极和阴极反应速度，并减小了腐蚀产物的厚度和保护作用。电影。此外，观察到，流速增加了N80钢的腐蚀电流密度，增加了双电层电容CPE，降低了电荷转移电阻Rt，并最终加速了钢的腐蚀速度。

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