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Surface-modified cerium oxide as a corrosion inhibitor to enhance the performance of epoxy coatings

Yinxia Dong (School of Materials Science and Engineering, Sichuan University of Science and Engineering, 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)
Xue-Jun Cui (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)
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)
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: 28 April 2023

Issue publication date: 13 June 2023

145

Abstract

Purpose

The study aims to investigate the anticorrosion performance of epoxy coatings using modified cerium oxide (CeO2) by terephthalic acid (CeO2-t) and fumaric acid (CeO2-f) as corrosion inhibitors.

Design/methodology/approach

The chemical state of CeO2-t, and CeO2-f were analyzed by infrared radiation (IR) and X-ray diffraction (XRD). The effect of different inhibitors on the coating properties was analyzed by neutral salt spray tests (NSST) and electrochemical impedance spectroscopy (EIS).

Findings

The results of IR and XRD illustrate that the modification of CeO2 was successful, and fumaric acid underwent a ring-opening reaction with epoxy resin (EP) in the coatings. The results of NSST and EIS showed that the coatings containing CeO2-f exhibited the best anticorrosion performance.

Originality/value

CeO2 is an effective inhibitor of the organic coatings. When surface modified, it is chemically bonded to EP, enhancing the anticorrosion performance of EP.

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., Zhang, Y., Cui, X.-J., Li, M., Xie, C. and Pan, Z. (2023), "Surface-modified cerium oxide as a corrosion inhibitor to enhance the performance of epoxy coatings", Anti-Corrosion Methods and Materials, Vol. 70 No. 4, pp. 149-156. https://doi.org/10.1108/ACMM-02-2023-2762

Publisher

:

Emerald Publishing Limited

Copyright © 2023, Emerald Publishing Limited

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