动态液膜下多尺度腐蚀电化学测试平台设计  

Design of Multi-scale Electrochemical Corrosion Monitoring Platform under Dynamic Liquid Film

作　　者：鞠虹 李焰 JU Hong;LI Yan(School of Materials Science and Engineering,China University of Petroleum(East China),Qingdao 266580,Shangdong,China)

机构地区：[1]中国石油大学(华东)材料科学与工程学院,山东青岛266580

出　　处：《实验室研究与探索》2022年第8期66-71,共6页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(52171092);教育部产学合作协同育人项目(202102251002);山东省重点研发计划项目(2019GHY112065);中国石油大学(华东)自主创新科研计划项目(19CX05001A)。

摘　　要：为满足实验室动态液膜下腐蚀行为的测试需求,开发了一套动态液膜下多尺度腐蚀电化学测试平台。该平台由动态液膜环境模拟和控制装置、液膜厚度自动测试装置、宏观电化学测试系统、微电极阵列测试系统和微区电化学测试系统组成,可以实现宏观、介观、微观等多尺度电化学信号的监测,准确表征动态液膜下局部腐蚀的电化学行为。以此实验平台为基础,设计动态液膜下多尺度电化学测试的综合实验。结果表明:金属腐蚀速率随液膜厚度的变化而变化;当液膜减薄时,金属局部电位和局部电流波动加剧,局部阴、阳极反应活性增大;宏观电化学、微电极阵列和微区电化学的实验结果能够很好地吻合。A multi-scale electrochemical testing platformis developed to meet the testing requirements of corrosion behavior under dynamic liquid films in the laboratory.The device is composed of a dynamic liquid film environment simulation and control device,liquid film-thickness automatic test device,macro-electrochemical test system,microelectrode array test system,and micro-electrochemical test system.The device can realize the monitoring of macro-,mesoscopic,and micro-scale electrochemical signals and accurately characterize the electrochemical behavior of local corrosion under a dynamic liquid film.Based on this testingplatform,a comprehensive experiment of multi-scale electrochemical tests under a dynamic liquid film is designed.The results show that the corrosion rate of metal varies with the thickness of liquid film.When the liquid film is thinned,the fluctuation of metal local potential and local current intensifies,and the activity of local cathode and anode reaction increases.The experimental results of macro electrochemistry,microelectrode array and micro electrochemistry are in good agreement.

关 键 词：测试装置 动态液膜 腐蚀电化学 多尺度电化学行为 

分 类 号：TG171[金属学及工艺—金属表面处理]