缝隙腐蚀内部微区离子浓度监测的研究进展

doi:10.11902/1005.4537.2022.325

中国腐蚀与防护学报

2023, Vol. 43

Issue (4): 828-836 CSTR: 32134.14.1005.4537.2022.325 DOI: 10.11902/1005.4537.2022.325

曹楚南科教基金优秀论文专栏

本期目录 | 过刊浏览

缝隙腐蚀内部微区离子浓度监测的研究进展

白一涵¹, 张航¹, 朱泽洁¹(

), 王疆瑛¹, 曹发和²

^1.中国计量大学材料与化学学院杭州 310018
^2.中山大学材料学院广州 510006

Research Progress of Monitoring Ion Concentration Variation of Micro-areas in Corrosion Crevice Interior

BAI Yihan¹, ZHANG Hang¹, ZHU Zejie¹(

), WANG Jiangying¹, CAO Fahe²

^1.School of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China
^2.School of Materials Science, Sun Yat-sen University, Guangzhou 510006, China

全文: PDF(3891 KB) HTML

摘要:

缝隙腐蚀早期缝隙内部微区化学组分的变化与缝隙腐蚀的发生发展过程密切相关。本文介绍了缝隙腐蚀的基本原理及其影响因素，综述了近年来缝隙腐蚀过程中缝隙内部微区离子浓度监测的研究进展，包括固态离子选择性电极技术、荧光分子原位监测法、取样分析法以及数值计算模拟的相关工作；同时简要介绍了采用微型电化学传感器结合扫描电化学显微镜 (SECM) 的电位响应模式，对不锈钢缝隙腐蚀早期缝隙内部微区离子浓度原位监测的相关工作，展望了其在金属材料缝隙腐蚀早期腐蚀机理研究中的应用。

关键词 ：缝隙腐蚀, 微型电化学传感器, 扫描电化学显微镜

Abstract：

In the early stage of crevice corrosion, the change of micro-chemical environment inside the crevice are closely related to the occurrence and development of crevice corrosion. This work briefly introduced the basic principles and influencing factors of crevice corrosion. Then the research progress in monitoring the ion concentration variation inside the crevice during recent years were summarized, including the in situ chemical imaging of solid-state ion-selective electrodes and fluorescence molecular in situ monitoring method, sampling analysis method and numerical calculation simulation. In addition, research work of micro-electrochemical sensors combined with SECM in the measurement of the ion concentration variation of micro-areas inside the crevice of stainless steel by our group is also introduced. Future applications of this technique in crevice corrosion are highlighted.

Key words： crevice corrosion microelectrochemical sensor scanning electrochemical microscopy

收稿日期: 2022-10-21 32134.14.1005.4537.2022.325

ZTFLH:

TG174

基金资助:国家自然科学基金(52001301);浙江省属高校基本科研业务费(2022YW45)

通讯作者: 朱泽洁，E-mail: zejiezhu@cjlu.edu.cn，研究方向为扫描电化学显微镜，电化学传感器，电化学腐蚀

Corresponding author: ZHU Zejie, E-mail: zejiezhu@cjlu.edu.cn

作者简介: 白一涵，女，1998年生，硕士生
朱泽洁，中国计量大学，材料与化学学院，讲师，硕士生导师。2019 年毕业于浙江大学化学系，获得博士学位，长期从事金属腐蚀表面原位空间电化学/化学成像研究工作，研究主要围绕电位响应型超微电极、次微米超微电极、双管超微电极的制备及其在金属材料局部腐蚀行为研究中的应用展开。获得2018 年度浙江省化学会创新奖。发表SCI 论文10 余篇，授权发明专利2 项。主持国家自然科学基金青年基金项目1 项、浙江省基础公益研究计划项目1项。2016 年获得全国腐蚀电化学及测试方法学术交流会优秀论文奖。

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引用本文:

白一涵, 张航, 朱泽洁, 王疆瑛, 曹发和. 缝隙腐蚀内部微区离子浓度监测的研究进展[J]. 中国腐蚀与防护学报, 2023, 43(4): 828-836.
BAI Yihan, ZHANG Hang, ZHU Zejie, WANG Jiangying, CAO Fahe. Research Progress of Monitoring Ion Concentration Variation of Micro-areas in Corrosion Crevice Interior. Journal of Chinese Society for Corrosion and protection, 2023, 43(4): 828-836.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.325 或 https://www.jcscp.org/CN/Y2023/V43/I4/828

图1 缝隙腐蚀的腐蚀行为示意图[13]

图2 缝隙腐蚀萌生阶段缝内金属的电位分布示意图[20]

图3 Fe在0.5 mol/L Na2SO4 (a=0.7 mm) 溶液中缝隙内部的pH分布图[34]

图4 N80碳钢在1.65% NaCl CO2饱和溶液中，含与不含600 mg/L HAc缝隙内外的pH随时间演化图[35]

图5 感光板上随时间变化的光学和荧光显微照片[38]

图6 高锰奥氏体不锈钢在0.01 mol/L NaCl (pH=3) 溶液中，缝隙腐蚀的总电流、pH和Cl-浓度随时间演化图[38]

图7 316L型不锈钢在2 mol/L KNO3溶液中缝隙内阳离子色谱图[40]

图8 304不锈钢在不同位置坐标处的pH随时间演化曲线[41]

图9 缝隙内溶液pH随时间的演化过程[43]

图10 201不锈钢在1 mol/L NaCl溶液 (pH=4.00，缝隙宽度为500 μm) 中，探针距离缝口不同位置处pH随时间的演化图

图11 201不锈钢在1 mol/L NaCl溶液 (pH=4.00) 中，不同缝隙宽度下缝隙内底部pH随时间演化图

图12 201不锈钢在1 mol/L NaCl (pH=4.00) 溶液中，缝隙内部不同位置处Cl-浓度随时间的演化图

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