油田采出水电化学处理阳极失效因素分析
Analysis of Failure Factors of Electrochemical Treatment of Anode in Oilfield Produced Water

DOI: 10.12677/JOGT.2019.413031, PP. 18-26

Keywords: 钛涂层电极，强化电极寿命，电极失效，表面活性涂层
Titanium Coated Electrode, Enhanced Electrode Life, Electrode Failure, Active Coating of Surface

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Abstract:

油田采出水成分复杂，电化学水处理技术应用越来越广泛。选取3种钛基氧化物电极，对其强化电极寿命和电极失效前后的表面活性涂层进行测试。借助SEM图、EDX图谱、XRD图谱、EIS图谱及极化曲线分析，研究了油田采出水电化学处理阳极失效机理。研究结果表明，3种钛基氧化物强化电极寿命时间分别为776、596、559 h，其电极的失效原因是由于涂层表面活性组分(RuO₂、IrO₂)的溶解脱落致使Ti基体裸露而发生钝化。该研究对改进电极结构与性能、延长电极使用寿命具有重要意义。
The composition of produced water in oil field was complex, and electrochemical water treatment technology was more and more widely used. Three kinds of titanium based oxide electrodes were selected to test the life of strengthened electrodes and the surface active coatings before and after electrode failure. Based on SEM, EDX, XRD, EIS atlas and analysis of polarization curves, the failure mechanism of electrochemical treatment of anode in oilfield produced water was studied. The results show that the life time of the three kinds of titanium-based oxide strengthened electrodes is 776 h and 596 and 599 h, respectively. The failure of the electrodes is due to the passivation of the Ti substrate due to the dissolution and shedding of the surface active components (RuO₂, IrO₂) of the coating. This study is of great significance to improve the structure and performance of the electrode and prolong the service life of the electrode.

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