The effect of magnetic fields on the electrodeposition of iron |
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Authors: | Jakub Koza Margitta Uhlemann Annett Gebert Ludwig Schultz |
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Institution: | (1) Leibniz Institute for Solid State and Materials Research Dresden, P.O. Box 27 01 16, 01171 Dresden, Germany |
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Abstract: | The effect of a uniform magnetic field with flux density up to 1 T on the electrodeposition of Fe from sulphate electrolyte
has been investigated under different field configurations relative to the electrode surface. Voltammetric and chronoamperometric
experiments have been carried out coupled with an electrochemical quartz crystal microbalance for in situ mass change measurements.
The structure and morphology of the deposited films were determined by scanning electron microscopy, atomic force microscopy
and X-ray diffraction measurements. Results show that, when the magnetic field is applied parallel to the electrode surface,
the limiting current density and the deposition rate are increased due to the magnetohydrodynamic effect. The nucleation process
is also affected in parallel configuration; the current density of the maximum on the chronoamperograms is decreased, and
an additional nucleation step might be observed. This effect is attributed to the hydrodynamic response of the electrochemical
system. No significant influence on the electrochemical reaction was observed when a magnetic field was applied perpendicular
to the electrode. But in this configuration, the morphology of deposited layers is changed by the magnetic field. The morphology
changes are discussed. No effect of the magnetic field on the crystallographic structure was observed. |
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Keywords: | Iron Electrodeposition Magnetic field Surface morphology Nucleation |
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