Study of high-frequency impedance of zinc-rich coatings
Source abstract
Abstract
In this paper, three types of impedance spectra were investigated, i.e., impedance spectra of two zinc powders (new and old) and five coatings (two different thicknesses of epoxy zinc-rich coatings (EZRCs), an ethyl silicate zinc-rich coating, an epoxy coating and an autodeposition coating) in 3.5 wt.% NaCl solution, dry film impedance spectra of two coatings (the thicker EZRC and autodeposition coating) and their impedance spectra in a 0.003 M LiCl–methanol solution. The results show that the resistive part of the high-frequency impedance of the ZRCs at the early stage of immersion is the contact resistance ( R m ) between the zinc powders, and the capacitive part is the parallel connection of the contact capacitance ( C m ) and the film capacitance ( C c ) of the binder. The coupling of the two capacitors results in a deviation of the measured P m from the true P m , where P m is the C m -dependent dispersion coefficient
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Smart Materials for Construction · High voltage insulation and dielectric phenomena
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Affiliations
School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, China
College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, China
College of International Education, Henan Normal University, Xin Xiang, China
Funding
Horizontal Project of Zhejiang University of Technology
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