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Kinetics of Ni-Nano Cr2O3 Composite Coating during Early Electro-Crystallization Processes

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Abstract:

Nucleation kinetics of Ni-nanoCr2O3 composite coating during early electro-crystallization was investigated. The results showed that, the early electro-crystallization processes of Ni-nanoCr2O3 composite coating and pure Ni coating followed a Scharifker-Hill nucleation/growth mechanism. At the low potential, the nucleation process of pure Ni and Ni-Cr2O3 composite system may approach to the progressive nucleation model; With the overpotential increasing, the nucleation model of Pure Ni and Ni-Cr2O3 composite system converts into the instantaneous nucleation mechanism controlled; at the same overpotential, Cr2O3 powder promotes the electro-crystallization nucleation of Ni. But at high negative potential, Cr2O3 powder in composite system promotes the electro-crystal nucleation of Ni weakly; the nanoCr2O3 powder added reduces the current efficiency in the nucleation process of Ni.

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Periodical:

Advanced Materials Research (Volumes 785-786)

Pages:

938-943

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.785-786.938

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Online since:

September 2013

Authors:

Li Bin Yu, Qi Jun Zhong, Yi Xiao, Jian Feng Gu, Qing Dong Zhong

Keywords:

Cyclic Voltammetry (CV), Electro-Crystallization, Nanocomposite Plating

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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