超声辅助电沉积Ni-Co/Y<sub>2</sub>O<sub>3</sub>复合镀层的电化学研究

doi:10.11896/cldb.201906018

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Abstract The aim of this work is to study the electrochemical behavior of Y₂O₃ nanoparticles in co-deposition process with Ni²⁺ and Co²⁺, and to explore the electro-crystallization mechanism of composite coating formation. Our study involved cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) tests for the ultrasonic-wave-assisted electrodeposition process of a plating system that contained Ni²⁺, Co²⁺ and Y₂O₃ nanoparticles, and obtained the kinetic parameters of co-precipitation by a calculation based on fitting the experimental curves. The results indicated that the addition of Y₂O₃ nanoparticles into the Ni²⁺-Co²⁺ system causes a positive shift for the initial de-position potential of Ni²⁺ and Co²⁺, and a decline in cathodic polarization. The nucleation/growth of both Ni-Co alloy and Ni-Co/Y₂O₃ composite coatings coincide well with Scharifker-Hill instantaneous nucleation model. Y₂O₃ nanoparticles can promote the nucleation of Ni²⁺ and Co²⁺ at low negative potentials, resulting in a higher nucleation rate for the Ni-Co/Y₂O₃ composite coating compared with the Ni-Co alloy coating, but will exert the opposite influence on the nucleation of Ni-Co alloy if more negative potentials are applied. The calculation results were in correspondence with the theoretical analysis over the experimental curves. According to the EIS result, Y₂O₃ nanoparticles have inconspicuous effect on the electric double layer at the electrode/electrolyte interface, but lead to diminishing charge transfer resistance in co-deposition.

Key words： ultrasonic-wave-assisted electrodeposition Ni-Co/Y₂O₃ composite coating electrochemical test electro-crystallization curve fitting kinetic parameter

Published: 03 April 2019

CLC number:

TG174.44

Fund:This work was supported by the National Natural Science Foundation of China (51674141), the Natural Science Fund of Liaoning Province (201602401).

About author:: Yiyong Wang received his Ph.D. degree in Nonferrous Metallurgy from Northeastern University in 2008.

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	WANG Yiyong
	ZHOU Xinyu
	JIN Hui
	LIANG Zhipeng

Cite this article:

WANG Yiyong,ZHOU Xinyu,JIN Hui, et al. Ultrasonic-wave-assisted Electrodeposition of Ni-Co/Y₂O₃ Composite Coatings: an Electrochemical Study[J]. Materials Reports, 2019, 33(6): 1011-1016.

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http://www.mater-rep.com/EN/10.11896/cldb.201906018 OR http://www.mater-rep.com/EN/Y2019/V33/I6/1011

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