Magnetic field effect on the rest potential of zinc

Fernando M.F. Rhen, G. Hinds, J. M.D. Coey

Research output: Contribution to journalArticlepeer-review

Abstract

We report a rest potential shift for a nonmagnetic electrode in a magnetic field. When a 1.5 T magnetic field is applied to zinc electrode, anodic shifts of 42 mV in paramagnetic solution (16 mM CuSO4) and 5 mV in diamagnetic solution (1 M KNO3 at pH 1) are observed. This shows that neither a ferromagnetic electrode nor a paramagnetic electrolyte is necessary to observe a field-induced rest potential shift. The effect, which varies with applied field as B0.8, is magnetohydrodynamic in origin, due to the action of the Lorentz force on the cathodic corrosion current. Anodic shifts are predicted for any actively corroding system under cathodic mass transport control.

Original languageEnglish
Pages (from-to)413-416
Number of pages4
JournalElectrochemistry Communications
Volume6
Issue number4
DOIs
Publication statusPublished - Apr 2004
Externally publishedYes

Keywords

  • Corrosion
  • Magnetic field
  • Magnetoelectrochemistry
  • Magnetohydrodynamics
  • Rest potential
  • Zinc

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