PROCESS OF DEPOSITION OF COAT Russian patent published in 1997 - IPC

FIELD: electrodeposition technology. SUBSTANCE: invention can be used for reduction and strengthening of inner surfaces of parts for instance, for zinc plating of body parts of shut-off gas equipment. Process of deposition of coat is realized by method of electrolytic rubbing of machined surface by rotating tool which side surface carries electrodes in the form of sectors of porous material to which electrolyte is supplied radially. In this case linear speed V_max of outer surface of electrodes is chosen from range , where α_H is equivalent of gas release of hydrogen, g/min; ρ_H is density of hydrogen, g/cu. cm; Q_H is amount of hydrogen liberated from unit of area of machined surface per time unit, cu. cm; α_mc is chemical equivalent of precipitation of metal of coat, g.sq.cm/A. min; I_c is cathode density of current, A/sq.cm; c is concentration of active component of metal of coat in electrolyte, g/cu.cm; Q_e is quantity of electrolyte fed to unit of area of porous material per time unit, cu.cm; L is width of sector of porous material of electrode, cm; R_e,R_H, $$ are water and gas permeabilities of porous material of electrode correspondingly unitless. EFFECT: increased efficiency of process. 1 dwg, 1 tbl