Preparation of polyvinylpyrrolidone/graphene oxide/epoxy resin composite coatings and the study on their anticorrosion performance |
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| Authors: | Jian Zhang Zhongyuan Liu Lanhe Zhang Jun Ma Dong Sun Di Zhang Jingrong Liu Haina Bai Bing Wang |
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| Affiliation: | 1. School of Chemistry Engineering, Northeast Electric Power University, Jilin, China;2. Tonghua Power Supply Company, State Grid Jilin Electric Power Co., Ltd, Tonghua, China;3. College of Biology and Food Engineering, Jilin Institute of Chemical Technology, Jilin, China |
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| Abstract: | Waterborne epoxy resin (EP) is often used as anticorrosive coating in the industrial field. However, small holes and gaps can be formed during the curing process. The corrosive medium easily penetrates the anticorrosive coating and corrodes the metal matrix. Herein, polyvinylpyrrolidone (PVP) and graphene oxide (GO) were doped into EP to improve the shielding and resistance to corrosive media. The composite coatings were prepared successfully by solution blending method. In the PVP/GO composite materials, original spatial structure of GO was changed and the composite was mainly combined by covalent bonding. The surface morphology of hybrid filler was flat and uniform, and the structural defects of GO was reduced. Compared with single-layer anticorrosive coating, the corrosion potential of PVP/GO/EP coating moved forward and the corrosion current density decreased. The ideal corrosion resistance of PVP/GO/EP composite coatings was mainly because agglomeration of GO sheet was obviously avoided after it was modified by PVP. Furthermore, the hybrid filler can be uniformly dispersed in the aqueous EP. It blocked the gaps and holes inside the coatings, which could contribute to form anticorrosive coatings. |
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| Keywords: | coatings electrochemistry nanocrystals nanoparticles nanowires |
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