Effect of Time Sensitivity on Morphology Evolution, Surface Compositions, and Corrosion Behavior of the Electrodeposited Ni–P Coating

• DOI: 10.2139/ssrn.4173919
• Publication Date: 2022-07-28T21:41:11Z
• Authors: Yucheng Wu; Zhaoyang Zhang; Kun Xu; Xueren Dai; Douyan Zhao; Hao Zhu; Yang Liu
• Keywords: Morphology

The coating properties obtained in previous studies are time-sensitive. In actual service process, the surface may be contact with air for a long time. Therefore, this study discusses evolution of morphology and corrosion resistance air-exposed coatings prepared by laser-assisted electrodeposition (LECD) (ECD) (LECDed ECDed). results show that amorphous oxidized (20 days, 25 °C) formed micron structure, roughness (Sa) increased one order magnitude. structure LECDed was more uniform, size variance smaller. addition, Tafel curve electrochemical impedance spectroscopy showed better than freshly coated surface. Moreover, Ni–P ECD coating. After exposure, exhibited hydrophobic self-sliding behaviors. angle between water droplets ECD, LECD approximately 120°. Compared fresh coating, good behavior, NiO C–C/C–H groups were owing to adsorption. improvement after oxidation is mainly due hydrophobicity. 150 days air-exposure, can still maintain