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

Qingsong Zhu, Yao Zhao, Baoji Miao*, Hala M. Abo-Dief, Muchao Qu, Rami Adel Pashameah, Ben Bin Xu, Mina Huang, Hassan Algadi, Xianhu Liu*, Zhanhu Guo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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.
Original languageEnglish
Article number107153
JournalProgress in Organic Coatings
Volume172
Early online date31 Aug 2022
DOIs
Publication statusE-pub ahead of print - 31 Aug 2022

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