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

Abstract

Nucleation kinetics of Ni-nanoCr2O3composite coating during early electro-crystallization was investigated. The results showed that, the early electro-crystallization processes of Ni-nanoCr2O3composite coating and pure Ni coating followed a Scharifker-Hill nucleation/growth mechanism. At the low potential, the nucleation process of pure Ni and Ni-Cr2O3composite system may approach to the progressive nucleation model; With the overpotential increasing, the nucleation model of Pure Ni and Ni-Cr2O3composite system converts into the instantaneous nucleation mechanism controlled; at the same overpotential, Cr2O3powder promotes the electro-crystallization nucleation of Ni. But at high negative potential, Cr2O3powder in composite system promotes the electro-crystal nucleation of Ni weakly; the nanoCr2O3powder added reduces the current efficiency in the nucleation process of Ni.

The ferromagnetic–antiferromagnetic properties of Ni–Cr2O3composite hollow spheres prepared by an in situ reduction method

“…17,22 Recently, the electrodeposition process was employed in the preparation of Ni-Cr 2 O 3 nanocomposites. 23,32 As we know, the ethylene glycol reduction method has been widely applied in the fabrication of inorganic nanostructures, including Ni and Cr 2 O 3 . 33,34 Therefore, this method can be effectively extended to the facile synthesis of Ni-Cr 2 O 3 nanocomposites.…”

The Electrodeposition of Amorphous/Nanocrystalline Ni–Cr Alloys from ChCl–EG Deep Eutectic Solvent

“…37 At higher deposition potential, residual stresses is larger, and resulting in high density of cracks. 38 Besides, with deposition potential increasing, the nucleation rate increases and its growth rate decreases, resulting grain refining. 39 Thus, the coating surface becomes denser and smoother with negative shift of deposition potential.…”