Layer-by-layer stacked graphene nanocoatings by Marangoni self-assembly for corrosion protection of stainless steel

Autor: Aimin Yu, Hongyan Sun, Chen Ye, Liang-Feng Huang, Nan Jiang, Li Fu, Shiyu Du, Qiuping Wei, Feiyue Chen, Cheng-Te Lin, Huifang Sun, Jinhong Yu, Wen Dai, Minghui Yang, Yangguang Zhu
Rok vydání: 2021
Předmět:
Zdroj: Chinese Chemical Letters. 32:501-505
ISSN: 1001-8417
DOI: 10.1016/j.cclet.2020.03.013
Popis: 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.
Databáze: OpenAIRE
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