Oscillatory Lorentz-force-driven flows during potentiostatic current oscillations in magnetic fields

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• 作者：Xuegeng Yang ; Kerstin Eckert ; Stefan Odenbach
• 关键词：Current oscillations ; MHD convection ; Particle image velocimetry ; Mass transport rate ; Interferometry
• 刊名：Electrochemistry Communications
• 出版年：2010
• 出版时间：November 2010
• 年：2010
• 卷：12
• 期：11
• 页码：1576-1580
• 全文大小：1654 K

文摘

The velocity and refractive index fields during potentiostatic current oscillations of iron electrode in with applied magnetic fields were measured by a combination of particle image velocimetry and interferometry. Depending on the magnetic field orientation differently oriented swirling flows around the electrode were observed in the activation phase. The resulting secondary flows crucially affect the concentration boundary layer thickness at the iron electrode, which finally strongly influences the duration of the passivation phase.