新型海洋用全固态Ag/AgX复合参比电极的性能
Performance of New Type All-Solid Ag/AgX Composite Reference Electrode for Marine Environment
摘 要
以聚苯胺(PANI)和聚吡咯(PPy)为电极添加剂,采用粉末压片法制备了Ag/AgX/PANI和Ag/AgX/PPy参比电极,在模拟海洋环境中进行了稳定性、温度响应特性、恒流极化和线性极化等性能测试。结果表明:Ag/AgX/PANI和Ag/AgX/PPy电极都具有与纯Ag/AgX电极同等优异的电位稳定性,且温度系数由0.36 mV/℃分别降低至0.27 mV/℃和0.26 mV/℃;在±5 μA/cm2恒电流密度条件下,两种复合电极电位均在1 h内达到稳定,其中Ag/AgX/PPy电极的电位漂移值更小,这与线性极化结果相一致;Ag/AgX/PPy电极在静态和动态海洋环境中的电位波动值在0.30 mV左右,进一步表明了Ag/AgX/PPy电极是一种有潜力的新型海洋用全固态复合参比电极。
聚苯胺(PANI)
聚吡咯(PPy)
稳定性
温度系数
抗极化性能
Ag/AgX reference electrode
polyaniline(PANI)
polypyrrole(PPy)
stability
temperature coefficient
depolarization performance
Abstract
The Ag/AgX/PANI and Ag/AgX/PPy reference electrodes were prepared by powder pressing method with polyaniline (PANI) and polypyrrole (PPy) as additions, and their performance of stability, temperature response characteristic, constant current polarization and linear polarization were tested in simulated marine environment. The results showed that Ag/AgX/PANI andAg/AgX/PPy electrodes had the same excellent potential stability as pure Ag/AgX electrode, and their temperature coefficient were reduced from 0.36 mV/℃ to 0.27 mV/℃ and 0.26 mV/ ℃, respectively. Under the constant current density condition of ±5 μA/cm2, the stable time of the two composite electrode potentials was within 1 h, and the potential drift value of Ag/AgX/PPy electrode was smaller, which was consistent with the results of linear polarization. The potential fluctuation value of Ag/AgX/PPy electrode in static and dynamic marine environments was about 0.30 mV, which further indicated that it can be a promising new type of all solid-state composite reference electrode for marine applications.
中图分类号 TG174.4 DOI 10.11973/fsyfh-202303010
所属栏目 试验研究
基金项目 山东省联合基金(U1706221)
收稿日期 2020/12/24
修改稿日期
网络出版日期
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引用该论文: PENG Yanrong,GAO Rongjie,GAO Tongxu. Performance of New Type All-Solid Ag/AgX Composite Reference Electrode for Marine Environment[J]. Corrosion & Protection, 2023, 44(3): 67
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【8】LUCAS K E,THOMAS E D,KAZNOFF A I,et al. Design of impressed current cathodic protection systems for U.S. Navy hulls[J]. Astm Special Technical Publication,1999,1370:17-38.
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【10】THOMAS J M. Student construction of a gel-filled Ag/AgCl reference electrode for use in a potentiometric titration[J]. Journal of Chemical Education,1999,76(1):97.
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