Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Influence of AC-DC-AC Cycling with Hydrostatic Pressure on Accelerated Protective Performance Test of Glass Flake Epoxy Coating

Yong Shen
ORCID logo ,
Likun Xu
* ,
Yilong Liu
,
Yonghong Lu
,
Haibo Xu
,
Rongrong Zhao
,
Shuangfeng Bai
,
Yonglei Xin
,
Jian Hou
,
Xuehui Liu
,
Feng Liu
Version 1 : Received: 19 October 2023 / Approved: 23 October 2023 / Online: 23 October 2023 (16:07:29 CEST)

A peer-reviewed article of this Preprint also exists.

Shen, Y.; Xu, L.; Liu, Y.; Lu, Y.; Xu, H.; Zhao, R.; Bai, S.; Xin, Y.; Hou, J.; Liu, X.; Liu, F. Influence of AC-DC-AC Cycling with Hydrostatic Pressure on Accelerated Protective Performance Test of Glass Flake Epoxy Coating. Coatings 2023, 13, 1843. Shen, Y.; Xu, L.; Liu, Y.; Lu, Y.; Xu, H.; Zhao, R.; Bai, S.; Xin, Y.; Hou, J.; Liu, X.; Liu, F. Influence of AC-DC-AC Cycling with Hydrostatic Pressure on Accelerated Protective Performance Test of Glass Flake Epoxy Coating. Coatings 2023, 13, 1843.

Abstract

To achieve a fast testing on barrier properties of organic coatings, immersion test, AC-DC-AC test, and coupled test of AC-DC-AC with hydrostatic pressure were conducted in seawater for a glass flake epoxy coating. Electrochemical impedance spectroscopy (EIS) was used to characterize the degradation processes of the coating during the tests, and the surface of the coating was analyzed using optical microscope, scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FTIR). The results show that the periodically cathodic polarization coupled with high hydrostatic pressure can accelerate the degradation of the coating by facilitating the diffusion and uptake of electrolyte and the delamination of the coating. The coupled test method has the largest acceleration due to the synergetic effect of AC-DC-AC and hydrostatic pressure.

Keywords

epoxy coating; protective performance; EIS; AC-DC-AC; hydrostatic pressure

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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