测量不锈钢电化学噪声的非对称表面方法  

Asymmetric Surface Configuration for Electrochemical Noise Measurement on Stainless Steel

作　　者：刘微 LIU Wei(School of Physics and Electronic Information Engineering,Ningxia Normal University,Guyuan 756000,China)

机构地区：[1]宁夏师范学院物理与电子信息工程学院,固原756000

出　　处：《中国腐蚀与防护学报》2023年第5期1151-1158,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：宁夏重点研发计划项目(2019BEB04012)。

摘　　要：提出一种基于同种材料不同表面处理的电极配对模式,采集非对称EN时域信号,主要反映单个电极的局部腐蚀扩展动态,从而拓展EN测量在不锈钢点蚀传播过程中的应用。结合EN与各个电极腐蚀电位的交替测量,提供各电极表面状态随浸泡时间的不同发展趋势的证据。研究结果有望提供一种EN测量局部腐蚀扩展过程的新模式,并建立EN信号与单电极上电化学腐蚀过程对应的电化学暂态模型,为测量、分析及预测钝性工程合金在海水中的局部腐蚀行为提供新的思路。An electrode pairing mode based on different surface treatments of the same material is proposed in this paper to collect the asymmetric EN signal in the time domain,which might mainly reflect the local corrosion propagation kinetics of one electrode,to expand the application of the EN measurement in the pitting propagation process of stainless steel.Combining the alternant measurement of the EN and the corrosion potential of the respective electrode,the evidence of the different development of each electrode surface state during immersion was provided.The results are expected to provide a new EN measurement configuration for detecting the local corrosion propagation,and establish a transient electrochemical model corresponding to the localized corrosion on one electrode,which provides a new approach for measuring,analyzing,and predicting the local corrosion behavior of the passive engineering alloys in the seawater.

关 键 词：不锈钢 点蚀 电化学噪声 非对称电极 交互递归分析 

分 类 号：TG174[金属学及工艺—金属表面处理]