Hydrothermally synthesized ZnO-RGO-PPy for water-borne epoxy nanocomposite coating with anticorrosive reinforcement

Zhu, Qingsong, Zhao, Yao, Miao, Baoji, Abo-Dief, Hala M., Qu, Muchao, Pashameah, Rami Adel, Xu, Bin, Huang, Mina, Algadi, Hassan, Liu, Xianhu and Guo, Zhanhu (2022) Hydrothermally synthesized ZnO-RGO-PPy for water-borne epoxy nanocomposite coating with anticorrosive reinforcement. Progress in Organic Coatings, 172. p. 107153. ISSN 0033-0655

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Official URL: https://doi.org/10.1016/j.porgcoat.2022.107153

Abstract

Waterborne epoxy (WEP) nanocomposite coating with hydrothermal synthesized zinc oxide (ZnO)-reduced graphene oxide (RGO)- polypyrrole (PPy) was prepared and an enhanced corrosion resistance was reported. Experiment results showed that WEP nanocomposite coating with Z8R2P (the mass ratio of ZnO-RGO-PPy of 8:2:1) exhibited the highest value of the impedance at the lowest frequency (such as |Z|0.01Hz), the lowest corrosion current density and the largest value of charge transfer resistance (Rct). Even after 94 days of immersion, the |Z|0.01Hz value of Z8R2P/WEP nanocomposite coating was 4.45 × 103 Ω·cm2, pointing out that Z8R2P/WEP coating possessed the long superior anticorrosion performance. Moreover, salt spray experiments with a period of 50 days showed that Z8R2P/WEP coating had the best integrity of coating compared with other coatings, revealing that Z8R2P/WEP coating had the best corrosion protection performance. The characterization and analysis of phase composition and corrosion morphology revealed that the synergistic protection mechanism of Z8R2P/WEP coating was attributed to barrier effects of RGO, chemical passivation of ZnO and accept the released electrons of PPy.

Item Type: Article
Additional Information: Funding information: This research is supported by the Science Foundation of National Key Laboratory of Science and Technology on advanced composites in special environments. The authors would like to thank the Deanship of Scientific Research at Umm Al-Qura University for supporting this work by Grant Code: (22UQU4320141DSR14).
Uncontrolled Keywords: Reduced Graphene Oxide, Polypyrrole, Corrosion, Epoxy, Nanocomposites
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: John Coen
Date Deposited: 24 Aug 2022 10:26
Last Modified: 07 Sep 2022 15:02
URI: https://nrl.northumbria.ac.uk/id/eprint/49947

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