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. Coatings2023, 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.
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. Coatings2023, 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.
Chemistry and Materials Science, Surfaces, Coatings and Films
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