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简要概述当前国内外具有空间分辨能力的扫描微探针技术及其在腐蚀研究中的应用,包括扫描微电极技术(SMET)、扫描电化学显微镜(SECM)、原子力显微镜(AFM)、扫描Kelvin探针技术(SKP)等,其中SMET、SECM、SKP及局部交流阻抗技术可直接测定腐蚀电极表面或界面电化学不均一性的分布图像,而原子力显微镜技术则是通过分子间作用力从纳米尺寸测量腐蚀过程表面形貌的变化.文中侧重介绍作者近年先后建立的具有微米空间分辨度的电化学微探针技术,并利用各种扫描探针技术研究金属/溶液界面电化学不均一性及其局部腐蚀过程.研究表明,空间分辨电化学方法的发展及应用,加深了人们对金属表面和金属/溶液界面电化学不均一性,特别是金属局部腐蚀发生、发展及过程机理的认识.
A brief overview of the current domestic and international space-resolution scanning microprobe technology and its application in corrosion research, including scanning microelectrode technology (SMET), scanning electrochemical microscopy (SECM), atomic force microscopy (AFM), scanning Kelvin Pin technology (SKP), etc. SMET, SECM, SKP and local AC impedance technology can be directly measured corrosion electrode surface or interface electrochemical non-uniform distribution of the image, and atomic force microscope technology is based on intermolecular force from the nano-size measurement The change of the surface topography during the etching process.The article focuses on the electrochemical micro-probe technology with micron spatial resolution established by the author in recent years and uses various scanning probe techniques to study the electrochemical inhomogeneity of metal / solution interface and its local Corrosion process.The research shows that the development and application of the space-resolved electrochemical method has deepened the understanding of the electrochemical heterogeneity on the metal surface and metal / solution interface, especially the occurrence, development and process mechanism of metal localized corrosion.