EFFECTS OF PULSATING MAGNETIC-FIELDS ON ELECTROLYTIC MASS-TRANSFER AROUND CYLINDRICAL CATHODES

The influence of pulsating magnetic fields on mass transfer was studie d experimentally in the electroreduction of ferrocyanide ions around a n inclined cylindrical cathode under diffusion-controlled conditions. The mass transfer rate is increased by applying the pulsating magnetic field as well as the static one. The time-averaged enhancement of the mass transfer rate is dependent markedly on duty cycle (ON-time ratio ), peak magnetic flux density of the applied pulsating magnetic fields in a range of 20 to 200 mHz, and slightly on its frequency. The mass transfer coefficient was correlated well by two types of non-dimension al regression equations with and without a duty-cycle factor, by using the ''magneto-diffusion factor'' to express the contribution of the a pplied magnetic flux density.