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Directional Electrodeposition of Micro-nano Superhyd-rophobic Coating on 316L Stainless Steel |
Bin JIANG1, Lilan ZENG1, Tao LIANG1, Haobo PAN2, Yanxin QIAO2, Jing ZHANG2, Ying ZHAO1() |
1 Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China 2 School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China |
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Abstract A micro-nano superhydrophobic nickel coating was prepared on 316L stainless steel in electrolyte of NiCl26H2O 1 mol/L, H3BO3 0.5 mol/L and ethylenediamine dihydrochloride 0.5~2.5 mol/L via a two-step electrodeposition process, namely, the first electrodeposition was performed by current density of 5 Adm-2 for 480 s in the electrolyte with 1.5 mol/L crystallization regulator, while the second electrodeposition was conducted by current density of 10 Adm-2 for 60 s. The prepared micro-nano superhydrophobic coating was characterized by means of surface analysis, electrochemical tests, and contact angle measurements. Results show that the micro-nano superhydrophobic coating presents typical needle-cone array structure with preferential orientation (110) plane and well superhydrophobic performance. With the increasing current density in the second electrodeposion step, the needle-cone array structure transforms gradually in petal-shaped hierarchical structure.
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Received: 02 August 2017
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Fund: Supported by National Natural Science Foundation of China (81572113, 51501218 and 51401092), Guangdong Natural Science Foundation Doctoral Fund (2014A030310129), Shenzhen Basic Research Project (JCYJ20160608153641020), Shenzhen Peacock Team Project (110811003586331), Shenzhen Hong Kong Innovation Project (SGLH20150213143207910) and Prospective Joint Research Project of Jiangsu Province (BY2016073-12) |
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