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Electrochemical impedance spectroscope analysis of microwave absorbing coatings on magnesium alloy in 3.5 wt.% NaCl solution
Q. Z. Guo; K. Q. Du; X. H. Guo; F. H. Wang
2013
Source PublicationElectrochimica Acta
ISSN0013-4686
Volume98Pages:190-198
AbstractTwo microwave absorbing coatings (MACs) are applied onto magnesium alloy substrate and are studied using electrochemical impedance spectroscopy (EIS) during immersion in 3.5% NaCl solution. The diffusion behavior of electrolyte through the MACs was firstly studied. The result shows that electrolyte transfers significantly fast in carbonyl iron loaded coating than barium ferrite loaded coating. In order to account for the distribution of different absorbents on corrosion process, a modified equivalent circuit with a distribute transmission line model was proposed to fit EIS spectra of MACs. Simulated EIS diagrams agree very well with experimental spectra of 25% and 50% PVC MACs. Moreover, simulation data was studied to analyze degeneration of two MACs. The result shows that the corrosion of Cl particles plays an important role for failure of Cl coating, but the degeneration of BF coatings which were slower than Cl coating was ascribed to defects within the coating. (C) 2013 Elsevier Ltd. All rights reserved.
description.department[guo, quanzhong ; du, keqin ; guo, xinhua ; wang, fuhui] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; du, kq (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; kqdu@imr.ac.cn
KeywordMicrowave Absorbing Coating Magnesium Alloy Electrochemical Impedance Spectroscopy Transmission Line Model Water Transport Behaviors Absorption Composites Models Iron Eis
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71233
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Q. Z. Guo,K. Q. Du,X. H. Guo,et al. Electrochemical impedance spectroscope analysis of microwave absorbing coatings on magnesium alloy in 3.5 wt.% NaCl solution[J]. Electrochimica Acta,2013,98:190-198.
APA Q. Z. Guo,K. Q. Du,X. H. Guo,&F. H. Wang.(2013).Electrochemical impedance spectroscope analysis of microwave absorbing coatings on magnesium alloy in 3.5 wt.% NaCl solution.Electrochimica Acta,98,190-198.
MLA Q. Z. Guo,et al."Electrochemical impedance spectroscope analysis of microwave absorbing coatings on magnesium alloy in 3.5 wt.% NaCl solution".Electrochimica Acta 98(2013):190-198.
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