Enhancement of Anticorrosion Properties of Epoxy Based Primer Coating by Bis[[3,4-Dihydroxyphenylmethylene] carbonothioicdihydrazide] on AA2024-T3 Alloy
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Date
2020
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Publisher
Pleiades journals compmg@maik.ru
Abstract
Abstract: A corrosion inhibitor bis[[3,4-dihydroxyphenylmethylene]carbonothioicdihydrazide] (DCT) was synthesized and used to improve the corrosion resistance of an epoxy based primer coating on AA2024-T3 alloy in NaCl solution. The ability of DCT to inhibit the corrosion was evaluated by electrochemical studies. The compound exhibited an inhibition efficiency of 99%. The surfaces of the corroded specimens were characterized by field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The anticorrosion nature of the substrate coated with a commercial epoxy-based primer doped with DCT was evaluated by electrochemical impedance spectroscopy and a salt spray test. The results established not only the ability of DCT to improve the anticorrosion property of the epoxy based primer coating on AA2024-T3 alloy but also a sustained corrosion protection (1000 h) of the alloy. © 2020, Allerton Press, Inc.
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Keywords
Corrosion inhibitors, Corrosion resistance, Corrosion resistant alloys, Electrochemical corrosion, Electrochemical impedance spectroscopy, Energy dispersive spectroscopy, Field emission microscopes, Scanning electron microscopy, Sodium alloys, Sodium chloride, X ray photoelectron spectroscopy, AA2024-T3 alloys, Anti-corrosion property, Electrochemical studies, Energy dispersive X ray spectroscopy, Field emission scanning electron microscopy, Inhibition efficiency, Primer coatings, Salt Spray test, Corrosion resistant coatings
Citation
Surface Engineering and Applied Electrochemistry, 2020, 56, 5, pp. 610-623