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Part of the book series: Fluid Mechanics and Its Applications ((FMIA,volume 51))

Abstract

Using a new type of electrode, MHDE, copper electrodeposition from acidic copper sulfate solution was examined.

Resultantly, remarkable hysteresis effect of the magnetic field on reaction rate emerged, accompanied with drastic decrease of the reaction activity.

To clarify this phenomenon, another experiment, i.e., copper dissolution in nitric acid was carried out. The results obtained exhibited the quite curious facts that in concentrated nitric acid, the dissolution process is almost blocked by magnetic field, whereas dilute nitric acid, on the contrary, makes acceleration of the dissolution.

All these results revealed the existence of micro-scopic MHD flow induced by the micro-scale electrochemical process and the magnetic field, which affects the unstable growth of the concentration fluctuation of copper ion to restrain or enhance the reaction.

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© 1999 Springer Science+Business Media Dordrecht

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Aogaki, R., Tadano, A., Shinohara, K. (1999). MHD and Micro-MHD Effects in Electrochemical Systems. In: Alemany, A., Marty, P., Thibault, J.P. (eds) Transfer Phenomena in Magnetohydrodynamic and Electroconducting Flows. Fluid Mechanics and Its Applications, vol 51. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4764-4_12

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  • DOI: https://doi.org/10.1007/978-94-011-4764-4_12

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-6002-8

  • Online ISBN: 978-94-011-4764-4

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