腐蚀电化学阻抗谱等效电路解析完备性研究  

On Completeness of EIS Equivalent Circuit Analysis for Electrochemical Corrosion Process

作　　者：王佳[1] 贾梦洋 杨朝晖[2] 韩冰[2] 

机构地区：[1]中国海洋大学化学化工学院,青岛266100 [2]钢铁研究总院青岛海洋腐蚀研究所,青岛266071

出　　处：《中国腐蚀与防护学报》2017年第6期479-486,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金重点项目(51131005);国家材料环境腐蚀平台(2015)~~

摘　　要：随着使用电化学阻抗谱方法研究腐蚀过程的工作日益增多,腐蚀电化学阻抗谱解析技术逐渐成为腐蚀科学家需要掌握的重要研究工具之一。近年来,电化学阻抗谱方法研究的腐蚀体系越来越复杂,不仅腐蚀环境和金属状态复杂化,且形成于金属表面界面膜层的种类也越来越多,导致简单电化学体系的阻抗谱等效电路解析方法越来越难以满足复杂腐蚀体系解析建模的要求。与动力学解析方法相比,模拟等效电路的解析方法因其简单直观而易于理解,应用范围日益扩展。但其固有的解析过程不严谨、不规范等不足,导致腐蚀过程等效电路模型缺陷增加和学术价值下降。为此,在多年研究腐蚀电化学阻抗谱等效电路解析方法的基础上,本文分析了电化学阻抗谱等效电路解析方法在腐蚀研究中的应用现状,探讨了等效电路方法解析腐蚀过程的优点和不足,以及提高这一解析方法学术价值的必要性和可行途径,以期建立严谨规范的腐蚀电化学阻抗谱等效电路模型解析路线,以适应复杂腐蚀过程的模型化研究需求,为腐蚀科学工作者提供一种高效实用的腐蚀电化学阻抗谱解析工具。ABCTRACT With the increasing utilization of electrochemical impedance spectroscopy（EIS） in the field of corrosion research,the EIS analysis gradually become a great and important means for corrosion scientists.Especially in recent years,the corrosion processes involved in EIS studies become more and more complicated,not only for the diversity of corrosion environments and metallic materials,but also superficial-and/or interfacial-membranes on metal surface,thus such complex systems may bring too much difficulties for dealing with the relevant items,therewith the requirements for the normal and simple EIS analysis may not be satisfied any more.Comparing with electrochemical kinetics,the EIS analysis with the simulated equivalent circuit（SEQC） is fast propagating recently,because it is more simple,intuitive and accepted for the corrosion scientists,especially the ones of non-professional electrochemists.However,there exists inherent deficiency,shortages in preciseness and normalization for that technique,which may result in lower credibility of the relevant model of SEQCs.Therefore,the practical and reliable means in analysis of EIS should be created for the corrosion scientists with inadequate experience in electrochemistry,hence,the issues related with EIS analysis of corrosion processes were examined by the authors based on their experience in the field： i.e.the review of the present situation and the advantages and disadvantages of the application of the EQCS in EIS analysis of corrosion processes,and the discussion on the necessity and feasibility to enhance the credibility of SEQC in corrosion EIS analysis so that to establish tentatively routs for precise and normalized analysis of corrosion EIS by means of SEQCs.

关 键 词：腐蚀过程 电化学阻抗谱 等效电路 模型 判据 

分 类 号：TG174[金属学及工艺—金属表面处理]