缝隙腐蚀内部微区离子浓度监测的研究进展  

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

作　　者：白一涵 张航 朱泽洁 王疆瑛[1] 曹发和 BAI Yihan;ZHANG Hang;ZHU Zejie;WANG Jiangying;CAO Fahe(School of Materials and Chemistry,China Jiliang University,Hangzhou 310018,China;School of Materials Science,Sun Yat-sen University,Guangzhou 510006,China)

机构地区：[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

出　　处：《中国腐蚀与防护学报》2023年第4期828-836,共9页Journal of Chinese Society For Corrosion and Protection

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

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。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.

关 键 词：缝隙腐蚀 微型电化学传感器 扫描电化学显微镜 

分 类 号：TG174[金属学及工艺—金属表面处理]