Journal
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
Volume 9, Issue 2, Pages -Publisher
NATL INST MATERIALS SCIENCE
DOI: 10.1088/1468-6996/9/2/024208
Keywords
electroplating; magnetoelectrolysis; magnetohydrodynamics; experiment; numerical simulation
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This paper discusses recent experimental and numerical results from the authors' labs on the effects of moderate magnetic (B) fields in electrochemical reactions. The probably best understood effect of B fields during electrochemical reactions is the magnetohydrodynamic (MHD) effect. In the majority of cases it manifests itself in increased mass transport rates which are a direct consequence of Lorentz forces in the bulk of the electrolyte. This enhanced mass transport can directly affect the electrocrystallization. The partial currents for the nucleation of nickel in magnetic fields were determined using an in situ micro-gravimetric technique and are discussed on the basis of the nucleation model of Heerman and Tarallo. Another focus of the paper is the numerical simulation of MHD effects on electrochemical metal depositions. A careful analysis of the governing equations shows that many MHD problems must be treated in a 3D geometry. In most cases there is a complex interplay of natural and magnetically driven convection.
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