Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 28    No. 12    December 2018

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Fabrication of Co-Ni-P film with excellent wear and corrosion resistance by electroplating with supercritical CO2 emulsion
Can-sen LIU1,2, Feng-hua SU1, Ji-zhao LIANG1

1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China;
2. School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China

Abstract:To avoid the defects caused by the hydrogen evolution and improve the corrosion and wear properties of the electroplated films in the traditional aqueous bath electrodeposition, a supercritical carbon dioxide (Sc-CO2) emulsion was proposed to electrodeposite ternary nanocrystalline Co-Ni-P alloy films. Microstructure, corrosive and tribological properties of the Co-Ni-P films were investigated and compared with the ones electroplated by conventional method. The results show that the Co-Ni-P films produced with Sc-CO2 assisted electrodeposition exhibit a more compact microstructure. The preferred orientation plane of hcp (110) for the Co-Ni-P films produced in conventional aqueous bath is changed to be hcp (100) for the one prepared in emulsified Sc-CO2 bath. The microhardness, corrosion resistance and tribological properties of the Co-Ni-P films are substantially improved with the assistance of Sc-CO2 in the electrodeposition bath.


Key words: Co-Ni-P film; electrodeposition; supercritical carbon dioxide; wear; corrosion

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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