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

Ying Qian, Wei Zheng, Wenge Chen*, Tao Feng, Terence Xiaoteng Liu, Yong Qing Fu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

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%.

Original languageEnglish
Article number126819
Pages (from-to)1-13
Number of pages13
JournalSurface and Coatings Technology
Volume409
Early online date2 Jan 2021
DOIs
Publication statusPublished - 15 Mar 2021

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