期刊
VACUUM
卷 195, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2021.110699
关键词
Cu/TiO2; Electrodeposition; Superhydrophobic; Mechanical stability; Corrosion resistance
资金
- Science and Technology Research Program of Chongqing Education Commission [KJQN201901223, KJQN201901228, KJQN202001234]
- Open Fund from Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir [WEPKL2018YB-06]
- Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan province [2021CL15]
- Natural Science Foundation of Chongqing of China [cstc2020jcyj-msxmX0826, cstc2021jcyj-msxmX1139]
A superhydrophobic Cu/TiO2 composite coating was prepared through electrodeposition and fluorination, showing excellent water repellency, mechanical stability, and corrosion resistance. The composite coating exhibits long-term stability and self-cleaning properties, potentially expanding the application of superhydrophobic coatings.
A superhydrophobic Cu/TiO2 composite coating was prepared through the electrodeposition and fluorinated modification of a 304 stainless steel surface. The Cu plating coated with the hierarchical concave-convex structure was initially fabricated by tuning current density and electrodeposition time. A codeposition technique was used in obtaining a composite coating comprising Cu matrix and TiO2 nanoparticles on the basis of the optimal electrodeposition parameters, then fluorination modification was immediately conducted for the production of a superhydrophobic Cu/TiO2 composite coating. The surface structure and chemical composition for the prepared coatings were studied. The wettability property shows that the modified Cu/TiO2 composite coating possesses excellent superhydrophobicity, with a water contact angle (CA) of 156.4 degrees and a sliding angle (SA) of 4.6 degrees. The superior mechanical stability of the superhydrophobic Cu/TiO2 composite coating has been confirmed using scratching, tape peeling and sandpaper abrasion tests, respectively. In addition, compared to the stainless steel with a certain protection capability, the corrosion current density of the as-prepared composite coating is decreased by nearly two orders of magnitude, and the corrosion resistance significantly improves. This composite coating exhibits the outstanding long-term stability and self-cleaning property, and may thus be a valuable tool for enlarging the application of the superhydrophobic coatings.
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