Study on wear and corrosion properties of functionally graded nickel-cobalt-(Al2O3) coatings produced by pulse electrodeposition

被引：0
作者：
Karimzadeh, A. [1 ]
Aliofkhazraei, M. [1 ]
Rouhaghdam, A. S. [1 ]
机构：
[1] Tarbiat Modares Univ, Dept Mat Engn, Fac Engn, Tehran 1411713116, Iran
来源：
BULLETIN OF MATERIALS SCIENCE | 2019年 / 42卷 / 02期
关键词：
Nickel-cobalt; nanoparticles; gradient coatings; corrosion; wear; NI-CO ALLOY; NANO-COMPOSITE COATINGS; PLATING PARAMETERS; ELECTROCHEMICAL PREPARATION; TRIBOLOGICAL PROPERTIES; MECHANICAL-PROPERTIES; MAGNETIC-PROPERTIES; GRAIN-SIZE; NANOCRYSTALLINE; RESISTANCE;
D O I：
10.1007/s12034-018-1715-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Functionally graded nickel-cobalt coatings with/without alumina nanoparticles were pulse electrodeposited on a carbon steel substrate by a continuous decrease in duty cycle from 95 to 10% at different frequencies of 100, 500 and 1000 Hz. The effect of pulse parameters on the nanoparticle content, chemical composition, microstructure, corrosion properties and tribological behaviour of coatings was studied. Energy-dispersive X-ray spectroscopy analysis showed that the amount of cobalt is gradually reduced and the content of alumina nanoparticles is increased from the substrate/coating interface to the surface. Based on the electrochemical studies in 3.5 wt% NaCl, the nanocomposite coatings gain the highest corrosion resistance at the lowest frequency. Also, the hardness of coatings gradually increased. Evaluation of the tribological behaviour of coatings by a pin-on-disk wear test showed that the nanoparticles have a positive effect on wear resistance and improve it by increasing frequency.
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页数：11
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