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Journal of Coatings Technology and Research

Erschienen in:

17.11.2020

Comparative study on the degradation of a zinc-rich epoxy primer/acrylic polyurethane coating in different simulated atmospheric solutions

verfasst von: Wei Sun, Chao Xing, Xiaobo Tang, Yu Zuo, Yuming Tang, Xuhui Zhao

Erschienen in: Journal of Coatings Technology and Research | Ausgabe 2/2021

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Abstract

The degradation of a zinc-rich epoxy primer/acrylic polyurethane coating system on carbon steel was studied in the simulated marine atmospheric solution (0.05% NaCl), industrial atmospheric solution (0.35% (NH₄)₂SO₄), and marine-industrial atmospheric solution (0.05% NaCl + 0.35% (NH₄)₂SO₄), by electrochemical impedance spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy methods. The influences of the soluble contaminants in the atmospheres, including chloride ions, sulfate ions, and ammonium ions, on the coating failure mechanism were compared and analyzed. The results showed that the degradation speed of the coating system in three simulated atmospheric solutions is in the following order: simulated marine atmosphere > simulated marine-industrial atmosphere > simulated industrial atmosphere. The degradation is mainly related to the permeation rate of the water through the coating. The aggressive ions, basic cations, and the property of the corrosion products also have influences on the degradation process. The alternating temperature environment (45°C 12 h + 25°C 12 h) could increase the degradation speed of the coating and the difference of the speed in the three solutions.

Vorheriger Artikel Fabrication of graphene-coated poly(glycidyl methacrylate) microspheres by electrostatic interaction and their application in epoxy anticorrosion coatings

Nächster Artikel Preparation and characterization of polyacrylate composite and its application in superhydrophobic coating based on silicone-modified ZnO

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Titel: Comparative study on the degradation of a zinc-rich epoxy primer/acrylic polyurethane coating in different simulated atmospheric solutions
verfasst von: Wei Sun
Chao Xing
Xiaobo Tang
Yu Zuo
Yuming Tang
Xuhui Zhao
Publikationsdatum: 17.11.2020
Verlag: Springer US
Erschienen in: Journal of Coatings Technology and Research / Ausgabe 2/2021
Print ISSN: 1547-0091
Elektronische ISSN: 1935-3804
DOI: https://doi.org/10.1007/s11998-020-00410-8

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