Layer-by-layer stacked graphene nanocoatings by Marangoni self-assembly for corrosion protection of stainless steel |
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| Authors: | Chen Ye Yangguang Zhu Hongyan Sun Feiyue Chen Huifang Sun Wen Dai Qiuping Wei Li Fu Aimin Yu Shiyu Du Minghui Yang Liang-Feng Huang Jinhong Yu Nan Jiang Cheng-Te Lin |
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| Affiliation: | 1. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;3. Laboratory of Environmental Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China;4. Bionic Sensing and Intelligence Center (BSIC), Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, Shenzhen 518055, China;5. College of Science, Henan University of Technology, Zhengzhou 450001, China;6. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;7. School of Materials Science and Engineering, Central South University, Changsha 410083, China;8. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;9. Department of Chemistry and Biotechnology, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn VIC 3122, Australia;10. Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, China |
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| Abstract: | Graphene nanosheets are widely used in anti-corrosion polymeric coating as filler, owing to the excellent electrochemical inertness and barrier property. However, as the arrangement of graphene nanosheets is difficult to form a perfect layered structure, polymeric coating with graphene nanosheets usually needs micron-scale thickness to ensure the enhancement of corrosion protection. In this work, layer-by-layer stacked graphene nanocoatings were fabricated on stainless steel by self-assembly based on Marangoni effect. The anti-corrosion property of graphene coatings were studied through Tafel polarization curves, electrochemical impedance spectroscopy and accelerated corrosion test with extra applied voltage. The self corrosion current density of optimized three-layered graphene coated sample was one quarter of that of bare stainless steel. And the self corrosion potential of optimized sample is increased to -0.045 V. According to the results, graphene nanocoatings composed of layered nanosheets exhibits good anti-corrosion property. Besides, the self-assembly method provide a promising approach to make layered-structure coating for other researches about 2D material nanosheets. |
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| Keywords: | Self-assembly Graphene nanosheets Layer-by-layer stacking Electrochemical corrosion Anti-corrosion coating |
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