Enhanced functional properties of CeO2 modified graphene/epoxy nanocomposite coating through interface engineering

Qian, Ying, Zheng, Wei, Chen, Wenge, Feng, Tao, Liu, Xiaoteng and Fu, Richard (2021) Enhanced functional properties of CeO2 modified graphene/epoxy nanocomposite coating through interface engineering. Surface and Coatings Technology, 409. p. 126819. ISSN 0257-8972

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Official URL: https://doi.org/10.1016/j.surfcoat.2020.126819

Abstract

This paper reports significant enhancement of corrosion resistance and electrical properties of waterborne epoxy coatings through additions of ceria modified graphene. Results showed that ceria particles were uniformly distributed and covalently bonded onto the surface of graphene. A dense interface layer was formed between the ceria modified graphene and epoxy matrix by aliphatic ether bonds. The composite coating with a modified graphene content of 0.5 wt% exhibited the best corrosion resistance with the highest impedance modulus (e.g., 103 Ω cm2 for the damaged coating) and the lowest corrosion rate (e.g., 0.002 mm/year). The excellent corrosion resistance of the composite coating is related to the barrier effect of graphene and the inhibition effect of ceria on metal corrosion. Moreover, the coating showed a low percolation threshold of 0.231 vol% and its electrical conductivity reached 10−5 S/m when the content of modified graphene was 0.5 wt%.

Item Type: Article
Additional Information: Funding Information: The authors would like to acknowledge the financial supports from Shaanxi Coal Industry Group United Fund of China (No. 2019JLM-2), Xi'an Science research project of China (No. 2020KJRC0089) and Electrical Materials and Infiltration Key Laboratory of Shaanxi Province Projects (No. 17JS080), Newton Mobility Grant (IE161019) through Royal Society.
Uncontrolled Keywords: Ceria, Conductivity, Corrosion resistance, Epoxy resin, Graphene
Subjects: F200 Materials Science
F300 Physics
H200 Civil Engineering
H300 Mechanical Engineering
H700 Production and Manufacturing Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Elena Carlaw
Date Deposited: 05 Feb 2021 14:39
Last Modified: 31 Jul 2021 17:02
URI: http://nrl.northumbria.ac.uk/id/eprint/45382

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