Improved Corrosion Resistance and Increased Hardness of Copper Substrates from Cu-Ni/Ni-P Composite Coatings. (2020)

• Record Type: Journal Article
• Authors: Dou, Wenwen; Li, Wen; Cai, Yuchen; Dong, Mengyao; Wang, Xiaojing; Fan, Jincheng; Zhou, Juying; Hou, Hua; Zhu, Shidong; Chen, Shougang; Guo, Zhanhu
• Is Part Of: MRS advances. Volume 5:Number 40/41(2020)
• Page Start: 2129
• Page End: 2137
• Publication Date: 2020
• Subjects: coating, -- composite, -- corrosion, -- electrodeposition, -- hardness; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/adv.2020.226
• Languages: English
• ISSNs: 2059-8521

Abstract

ABSTRACT: To improve the corrosion resistance and to increase the hardness of copper substrate in marine environment, the Cu-Ni/Ni-P composite coatings were prepared on the copper substrate using the galvanostatic electrolytic deposition method. The deposition current densities were explored to find the optimized deposition conditions for forming the composite coatings. Corrosion resistance properties were analyzed using the polarization curves and electrochemical impedance spectroscopy (EIS). Considering the corrosion resistance and hardness, the −20 mA/cm 2 was selected to deposit Cu-Ni coatings on copper substrate and the −30 mA/cm 2 was selected to deposit Ni-P coating on the Cu-Ni layer. The Cu-Ni/Ni-P composite coatings not only exhibited superior corrosion resistance compared to single Cu-Ni coating in 3.5 wt.% NaCl solution, but also showed much better mechanical properties than single Cu-Ni coating.