Failure Mechanism of Ag/AgCl Reference Electrode Due to Current Leakage
摘 要
采用热浸涂-电化学还原方法制备了Ag/AgCl参比电极, 通过加速极化试验方法研究了电极失效过程及机理。采用扫描电子显微镜(SEM)、能谱仪(EDX)和电化学阻抗(EIS)测试手段研究了电极失效过程中表面状态、形貌及性能的变化。结果表明, Ag/AgCl参比电极失效后电极电位出现大幅波动, 电极表面呈疏松多孔结构, AgCl完全转化为银, Ag/AgCl参比电极在漏电流情况下失效的主要原因是电极中AgCl被还原为银所致。
Abstract
A Ag/AgCl reference electrode was prepared by thermal-dip coating followed by electrochemical reduction. The failure mechanism of the electrode was studied by accelerated polarization method. The microstructure and performance of the electrode were analyzed by scanning electron microscopy(SEM), energy dispersed X-ray spectroscopy(EDX), and electrochemical impedance spectroscopy(EIS). After the acceleration test, the potential of the Ag/AgCl reference electrode fluctuated grjeatly, and the electrode surface showed a morphology of porous structure. EDX results indicate that AgCl transformed into Ag completely on the electrode surface. So, the failure of Ag/AgCl reference electrode could be attributed to the complete transformation of AgCl into Ag.
中图分类号 TG174.41
所属栏目 失效分析
基金项目
收稿日期 2012/5/4
修改稿日期
网络出版日期
作者单位点击查看
备注陆文萍, 助理工程师,
引用该论文: LU Wen-ping,YIN Peng-fei,XU Li-kun,XIN Yong-lei. Failure Mechanism of Ag/AgCl Reference Electrode Due to Current Leakage[J]. Corrosion & Protection, 2013, 34(3): 262
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】胡士信.阴极保护工程手册[M].北京: 化学工业出版社, 1999.
【2】王梦城.阴极保护和参比电极[J].防腐保温技术, 2006, 14(1): 25-30.
【3】Matsumoto T, Ohashi A, Ito N.Development of a micro-planar Ag/AgCl quasi-reference electrode with long-term stability for an amperometric glucose sensor[J].Analytica Chimica Acta, 2002, 462(2):253-259.
【4】周海晖, 陈范才, 张小华, 等.Ag/AgCl固体参比电极的研究[J].腐蚀科学与防护技术, 2001, 13(4): 234-236.
【5】向斌, 粟京, 李焰, 等.Ag/AgCl 固体参比电极性能研究[J].高技术通讯, 2006, 16(12):1265-1268.
【6】Nolan M A, Tan S H, Kounaves S P.Fabrication and characterization of a solid state reference electrode for electroanalysis of natural waters with ultramicroelectrodes[J].Analytical Chemistry, 1997, 69(6): 1244-1247.
【7】Frank J Ansuini. Factors afecting the accuracy of reference electrodes[J].Materials Performance, 1994, 11(5): 24-28.
【8】尹鹏飞, 薛桂林, 王均涛, 等. 还原方法对热浸涂银卤化银参比电极的影响研究[J]. 腐蚀与防护, 2009, 30(10): 696-700.
【2】王梦城.阴极保护和参比电极[J].防腐保温技术, 2006, 14(1): 25-30.
【3】Matsumoto T, Ohashi A, Ito N.Development of a micro-planar Ag/AgCl quasi-reference electrode with long-term stability for an amperometric glucose sensor[J].Analytica Chimica Acta, 2002, 462(2):253-259.
【4】周海晖, 陈范才, 张小华, 等.Ag/AgCl固体参比电极的研究[J].腐蚀科学与防护技术, 2001, 13(4): 234-236.
【5】向斌, 粟京, 李焰, 等.Ag/AgCl 固体参比电极性能研究[J].高技术通讯, 2006, 16(12):1265-1268.
【6】Nolan M A, Tan S H, Kounaves S P.Fabrication and characterization of a solid state reference electrode for electroanalysis of natural waters with ultramicroelectrodes[J].Analytical Chemistry, 1997, 69(6): 1244-1247.
【7】Frank J Ansuini. Factors afecting the accuracy of reference electrodes[J].Materials Performance, 1994, 11(5): 24-28.
【8】尹鹏飞, 薛桂林, 王均涛, 等. 还原方法对热浸涂银卤化银参比电极的影响研究[J]. 腐蚀与防护, 2009, 30(10): 696-700.
相关信息