Effect of Current Density on the Performance of Ni–P–ZrO2–CeO2 Composite Coatings Prepared by Jet-Electrodeposition

Autor: Shuanglu Duan, Zhaoyang Song, Qingqing Wang, Jinran Lin, Xiuqing Fu, Hongwen Zhang, Moqi Shen
Rok vydání: 2020
Předmět:
Zdroj: Coatings, Vol 10, Iss 616, p 616 (2020)
Coatings
Volume 10
Issue 7
ISSN: 2079-6412
DOI: 10.3390/coatings10070616
Popis: The objective of this study was to improve the surface properties, hardness, wear resistance and electrochemical corrosion resistance of #45 steel. To this end, Ni&ndash
P&ndash
ZrO2&ndash
CeO2 composite coatings were prepared on the surface of #45 steel using the jet-electrodeposition technique by varying the current density from 20 to 60 A/dm2. The effect of current density on the performance of the composite coatings was evaluated. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) were applied to explore the surface topography, elemental composition, hardness and electrochemical corrosion resistance of the composite coatings. The results showed that with the increase in the current density, the hardness, wear resistance, and electrochemical corrosion resistance tends to increase first and then decrease. At a current density of 40 A/dm2, the hardness reached a maximum of 688.9 HV0.1, the corrosion current reached a minimum of 8.2501×
10&minus
5 A·
cm&minus
2, and the corrosion potential reached a maximum of &minus
0.45957 V. At these values, the performance of the composite coatings was optimal.
Databáze: OpenAIRE