The effect of magnetic fields on the electrodeposition of CoFe alloys

The effect of a uniform magnetic field with a flux density up to 1 T and different configurations relative to the electrode surface, on the electrodeposition of Co, Fe and CoFe alloys from acidic sulphate electrolytes has been investigated. It was found that a magnetic field applied parallel to the...

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Bibliographic Details
Published in:Electrochimica acta 2008-06, Vol.53 (16), p.5344-5353
Main Authors: Koza, Jakub Adam, Uhlemann, Margitta, Gebert, Annett, Schultz, Ludwig
Format: Article
Language:English
Subjects:
Anomalous codeposition
Applied sciences
Chemistry
CoFe alloys
Electrochemistry
Electrodeposition
Exact sciences and technology
General and physical chemistry
Lorentz force
Magnetic field
Magnetoelectrodeposition
Metallic coatings
Metals. Metallurgy
Production techniques
Study of interfaces
Surface treatment
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Summary:The effect of a uniform magnetic field with a flux density up to 1 T and different configurations relative to the electrode surface, on the electrodeposition of Co, Fe and CoFe alloys from acidic sulphate electrolytes has been investigated. It was found that a magnetic field applied parallel to the electrode surface increases the limiting current density and deposition rate due to the magnetohydrodynamic (MHD)-effect caused by the Lorentz force. No significant changes of the limiting current density and deposition rate with a magnetic field applied in the perpendicular to electrode configuration were observed. But in this configuration desorption of hydrogen was found to be supported by a magnetic field. The chemical composition of the deposited alloys was found to be unaffected by the magnetic field. The deposition of CoFe at the highest applied potential (−1600 mV MSE) was found to be anomalous. At this potential the increase of the interface pH value is sufficient for hydroxyl species formation.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2008.02.082