CHANGE OF THE ELECTRODE SURFACE IN THE PRESENCE OF POWDER PARTICLES IN THE ELECTROLYTE

Electrolytic coating of powder particles has been realized in fluidize d state with good experimental results. Theoretical treatment of this process is much more complicated. From the set of theoretical problems connected with this process, attention was paid to the change of the solid electrode surface as a consequence of impinging powder particles on the electrode. Two quantities were derived in order to solve the p roblem: first, the ''working volume'' describing that volume of the el ectrolyte attached to the solid electrode where the elastic impacts of powder particles on the electrode and, consequently, the charge trans fer occur; second, the increment of surface change originating from th e contribution of particles contacting the electrode. Both quantities were calculated for various particles size and suspension density defi ned as powder to total volume ratio. The model calculations were confr onted with experimental results.