硫酸銅浴からのパルス電析におよぼす磁場の影響

抄録

The oxygen content of the baths and the magnetic field during electrolysis had an effect on electrodeposition and anodic dissolution by the cathodic and anodic polarization curves and current efficiencies measurement. The oxygen content of the bath was small relative to the cathodic reaction. The magnetic field had no effect on the rate-determining step, but increased the charge transfer current in both cathodic and anodic reactions. The effect on the crystal orientation of the electrodeposits and surface after anodic dissolution in pulse electrolysis were small. Cathodic efficiency increased, and anodic efficiency decreased over 0.5mol·dm^-3 CuSO₄ solution by magnetic field effects. The magnetic field effects could not explained by Lorentz force, and it is concluded that it was effected by natural convection currents occuring due to concentration gradient. When using the effects of magnetic fields in pulse electrolysis, it is necessary to determine in more detail the concentration of the species in the bath, and the magnetic flux density, as well as on-time, off-time, pulse cycle.