全氟磺酸膜对海洋电场电极抗腐蚀与电场响应性能影响的研究

doi:10.11902/1005.4537.2018.151

中国腐蚀与防护学报

2019, Vol. 39

Issue (6): 581-587 DOI: 10.11902/1005.4537.2018.151

本期目录 | 过刊浏览

全氟磺酸膜对海洋电场电极抗腐蚀与电场响应性能影响的研究

王泽臣,林君(

),杨国卿,梁尚清

杭州电子科技大学电子信息学院杭州 310037

Effect of Nafion Film on Corrosion Resistance and Electric Field Response of Marine Electric Field Electrode

WANG Zechen,LIN Jun(

),YANG Guoqing,LIANG Shangqing

College of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310037, China

全文: PDF(3615 KB) HTML

摘要:

提出一种PVC+NaCl作为固体电解质层，全氟磺酸 (Nafion) 膜作为保护层的电极修饰方法，用以解决常规Ag/AgCl海洋电场电极易受海水中Br^-和I^-侵蚀的问题。与常规Ag/AgCl电极相比，改性后的电极具有同一级别的电场响应性能，且在高浓度的Br^-溶液中具有更好的电位稳定性及抗腐蚀能力，能正确响应频率为1，0.1和0.01 Hz的电场信号，其线性度分别为2.163%，4.356%和6.720%，电极自噪声可低至14.037 $n V / H z$ 。

关键词 ： Ag/AgCl电极, Nafion膜修饰电极, 电场响应性能, 电极腐蚀

Abstract：

Aiming at the problem that the conventional Ag/AgCl marine electric field electrode is susceptible to Br^-, I^- corrosion in seawater, this paper proposes a novel replacement, which composed of PVC+NaCl as the solid electrolyte layer and Nafion film as the protective layer. Compared with the conventional Ag/AgCl electrode, the new electrode presents not only the same grade of responsiveness to the electric field, but also higher stability and corrosion resistance. The electrode can accurately respond to electric field signals at frequencies of 1, 0.1 and 0.01 Hz, correspondingly the linearity is 2.163%, 4.356% and 6.720%, respectively, while the intrinsic noise of the new electrode can be as low as 14.037 $n V / H z$ .

Key words： Ag/AgCl electrode Nafion membrane modified electrode electric field response performance electrode corrosion

收稿日期: 2018-10-17

ZTFLH:

TJ43.1

基金资助:浙江省自然科学基金(LQ16B070001);浙江省自然科学基金(LY17B060012)

通讯作者: 林君 E-mail: junlin@hdu.edu.cn

Corresponding author: Jun LIN E-mail: junlin@hdu.edu.cn

作者简介: 王泽臣，男，1995年生，硕士生

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引用本文:

王泽臣, 林君, 杨国卿, 梁尚清. 全氟磺酸膜对海洋电场电极抗腐蚀与电场响应性能影响的研究[J]. 中国腐蚀与防护学报, 2019, 39(6): 581-587.
WANG Zechen, LIN Jun, YANG Guoqing, LIANG Shangqing. Effect of Nafion Film on Corrosion Resistance and Electric Field Response of Marine Electric Field Electrode. Journal of Chinese Society for Corrosion and protection, 2019, 39(6): 581-587.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2018.151 或 https://www.jcscp.org/CN/Y2019/V39/I6/581

表1 人工海水配方

图1 电位变化测试装置

图2 电场响应测试装置

图3 电化学自噪声测试装置

图4 腐蚀过程中测试电极相对甘汞电极的电位变化

图5 A1，A2，B1和B2组试样的 SEM像及EDS检测结果

表2 腐蚀前后电极表面元素变化 (mass fraction / %)

图6 电极对频率1，0.1和0.01 Hz信号的响应电压

表3 改性电极、未改性电极和空白对照组电极对于频率为1，0.1和0.01 Hz的电场信号的响应线性度和灵敏度

图7 测试系统、改性电极、未改性电极、空白对照组电极的自噪声

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