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Cerium dioxide modified with fumaric acid as corrosion inhibitor for epoxy coatings on Q235

Yinxia Dong (School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, China)
Mingtian Li (School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, China and Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong, China)
Yingjun Zhang (School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, China and Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong, China)
Chun Xie (Chengdu Longzhiquan Science and Technology Co., Ltd., Chengdu, China)
Zhongwen Pan (Chengdu Longzhiquan Science and Technology Co., Ltd., Chengdu, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 2 January 2023

Issue publication date: 9 February 2023

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Abstract

Purpose

The purpose of this study is to modify cerium dioxide with fumaric acid (CeO2-f) to improve its compatibility and dispersibility in epoxy resin and to investigate the effect of the content on the coating performance.

Design/methodology/approach

To investigate whether CeO2-f reacts with epoxy resin by ring opening, CeO2-f and epoxy resin-treated CeO2-f (Ce CeO2-f/EP) were analyzed by infrared radiation (IR), X-ray diffraction (XRD) and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis). To reveal the effect of different content on coatings properties, neutral salt spray test (NSST) and electrochemical test were performed.

Findings

The results of IR, XRD, X-ray photoelectron spectroscopy and UV-Vis indicated that fumaric acid attached to the CeO2 surface by chemical bonding and underwent a ring-opening reaction with epoxy resin, thus, improving the compatibility of CeO2 in epoxy resin. NSST and electrochemical impedance spectroscopy results showed that the coatings containing 5% CeO2-f exhibited the optimal corrosion resistance. The reason is that a dense conversion film was established on the substrate surface.

Originality/value

The epoxy coatings using CeO2-f as fillers with synergistic inhibition ability are promising for the protection of carbon steel.

Keywords

Acknowledgements

This work was financially supported by Science and Technology Plan Project of Sichuan Province (No. 2020ZHCG0081), National Natural Science Foundation of China (No. 51801131).

Conflicts of interest: There are no conflicts of interest to declare.

Citation

Dong, Y., Li, M., Zhang, Y., Xie, C. and Pan, Z. (2023), "Cerium dioxide modified with fumaric acid as corrosion inhibitor for epoxy coatings on Q235", Anti-Corrosion Methods and Materials, Vol. 70 No. 2, pp. 59-68. https://doi.org/10.1108/ACMM-10-2022-2708

Publisher

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Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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