环氧富锌涂层电化学阻抗谱分析两种等效电路模型的比较研究

IF 1.5 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
De-Ming Xie, Tian-Yu Wang, Jing-Ping Xie, Fang-Yuan Cao, Yu-Guang Wang
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引用次数: 0

摘要

研究了环氧富锌涂层(ZRC)及其自由膜在3.5% NaCl溶液中的阻抗谱,比较了串联和嵌套等效电路拟合的拟合误差和模型参数变化趋势,并分析了ZRC与环氧涂层高频成分的差异。结果表明:ZRC的高频阻抗是锌粉之间的接触阻抗(Zm),而不是薄膜阻抗(Zf);zrc的腐蚀反应由氧的扩散控制。对于zrc,串联等效电路比嵌套等效电路更合理。基于串联等效电路,研究了等效电路元件(电阻、电容和色散系数)的变化规律,以及这些元件与低频阻抗模量(|Z|0.01Hz)和开路电位(OCP)的相关性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative study of two equivalent circuit models for electrochemical impedance spectroscopy analysis of epoxy zinc-rich coatings
In this paper, the impedance spectra of an epoxy zinc-rich coating (ZRC) and its free film immersed in 3.5% NaCl solution are investigated, the fitting error and model parameter trends of series and nested equivalent circuit fits are compared, and the differences in the high-frequency components of the ZRC and the epoxy coatings are analyzed. The results show that the high-frequency impedance of ZRC is the contact impedance between the zinc powders (Zm) rather than the film impedance (Zf). The corrosion reaction of the ZRCs is controlled by the diffusion of oxygen. For ZRCs, the series equivalent circuits are more reasonable compared to the nested equivalent circuit. Based on the series equivalent circuit, the variation law of the equivalent circuit elements (resistors, capacitors and dispersion coefficient) and the correlation of these elements with low-frequency impedance modulus (|Z|0.01Hz) and open circuit potential (OCP) are investigated in this paper.
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来源期刊
Corrosion Engineering, Science and Technology
Corrosion Engineering, Science and Technology 工程技术-材料科学:综合
CiteScore
3.20
自引率
5.60%
发文量
58
审稿时长
3.4 months
期刊介绍: Corrosion Engineering, Science and Technology provides broad international coverage of research and practice in corrosion processes and corrosion control. Peer-reviewed contributions address all aspects of corrosion engineering and corrosion science; there is strong emphasis on effective design and materials selection to combat corrosion and the journal carries failure case studies to further knowledge in these areas.
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