Investigation on time-dependent wetting behavior of Ni-Cu-P ternary coating

被引:19
作者
Wang, Jie [1 ]
Liu, Junpeng [1 ]
Neate, Nigel [1 ]
Bai, Mingwen [1 ]
Xu, Fang [1 ]
Hussain, Tanvir [1 ]
Scotchford, Colin [1 ]
Hou, Xianghui [1 ]
机构
[1] Univ Nottingham, Fac Engn, Univ Pk, Nottingham NG7 2RD, England
关键词
Wettability; Airborne hydrocarbon; Hydrophobicity; Ni-Cu-P ternary alloy; Lattice oxygen; Electrodeposition; THIN-FILMS; SUPERHYDROPHOBIC SURFACES; ELECTROLESS DEPOSITION; WETTABILITY CONTROL; W-P; ALLOY; ELECTRODEPOSITION; NANOSTRUCTURES; HYDROCARBONS; ADSORPTION;
D O I
10.1016/j.jallcom.2018.06.239
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Hydrophobic metallic coatings have attracted increasing interest in the recent years due to their excellent mechanical durability. But the wetting behavior and hydrophobic mechanism of metallic coatings are far from clear. In this work, Ni-Cu-P ternary coatings with hierarchical structure were prepared on 304 stainless steel by electrodeposition method. The surface morphologies, phase compositions, and wetting behavior were studied systemically. Time-dependent wetting behaviour of Ni-Cu-P coatings had been clearly observed, and the surface of the as-deposited coatings changed from hydrophilic state to hydrophobic state after aging in ambient air. The related surface wetting mechanism was investigated with the assistance of plasma cleaning to study the possible surface adsorption contributing to the time-dependent wetting behavior. The variations of the surface species were analyzed using X-ray photoelectron spectroscopy (XPS), showing the composition change of both carbon and the oxygen. The atomic ratio of hydrocarbon on the Ni-Cu-P coating first increased from 78.7% to 86.5% when stored in ambient air and then decreased from 82.3% to 65.9% after the plasma cleaning treatment; while the variation of oxygen content was an opposite trend. The results indicated that the observed timedependent wettability was a combined result of the adsorption of airborne hydrocarbon and the change of lattice oxygen on the coating surface. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码:221 / 228
页数:8
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