Abstract
The dynamic changes in the concentration and diffusion layer at the Ni/CoCl2 solution interface were studied by digital holography during the electrodeposition of cobalt on a nickel electrode in 0.15 M CoCl2 with and without an external magnetic field. Edge electrodeposition was observed under the condition of a non-uniform magnetic field on the electrode. The concentration distribution at the interface was consistent with the intensity of the magnetic field distribution. However, there was no “edge electrodeposition” during the electrodeposition of cobalt on copper electrodes under magnetic field conditions. It was proposed that the edge electrodeposition of cobalt on a nickel electrode under magnetic field conditions was mainly caused by the magnetic gradient force and the Lorentz force around the edges of the magnetised electrode.
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