Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8955678 | Surface and Coatings Technology | 2018 | 24 Pages |
Abstract
In this study, poly-dopamine (pDA) was used to prepare a nickel-graphene (GR) composite coating on 45# steel by utilizing the electrodeposition techniques. The pDA has two advantages for the Ni/GR@pDA composite coatings: (1) improving the dispersion of graphene in the aqueous solution; (2) enhancing the bonding force between GR and the substrate. The high resolution transmission electronic microscope (HRTEM) and the energy dispersive spectroscope (EDS) confirmed that GR was coated with a layer of pDA, which is the product of the situ spontaneous oxidative polymerization reaction of dopamine (DA). Dispersion test result showed that the modified GR could disperse in the aqueous solution stably for more than 4â¯h. The dispersion of GR was improved obviously. The friction-wear and corrosion experiments indicated that the performance of composite coating was raised significantly than the pure Ni coating. Because the grains of the composite coating were refined, the micro-nano binary structure was formed on the coating surface. Hence the hydrophobicity of the coating was greatly improved.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Jianfeng Chen, Jiangtao Zhang, Mingjin Hu, Zhiqiang Zheng, Kaidong Wang, Xiaobing Li,