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The mechanism of rare earth metals (Gd and Dy) chloride complexes electroreduction on the tungsten electrode in equimolar NaCl-KCl melt at 973 K has been studied by linear and cyclic voltammetry. Some kinetic parameters of processes were calculated. It was shown that the tungsten electrode was indifferent to gadolinium and dysprosium which were reduced on the surface. We found that the discharge mechanism of gadolinium and dysprosium chloride complexes was described by three-electron step when the steady-state conditions of polarization were limited by the mass transfer stage. The conditions of nonstationary polarization made the slowness of the charge transfer stage. The diffusion coefficient of gadolinium and dysprosium ions was calculated, the diffusion coefficient of ions was (0.9, and for ions, it was (1.60 ± 0.2) × 10 −5 сm 2 ·s DyCl −

This work presents the results of joint electroreduction of tetrafluorborate and cerium-ions, and determines the conditions of electrochemical synthesis of cerium borides in KCl-NaCl melts at the 973 K on tungsten electrode by the linear and cyclic voltammetry. Based on the current-voltage studies the optimal modes of cerium boride electrodeposition were found.

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We investigated the processes of electrochemical deposition of metallic tungsten and molybdenum, carbides of molybdenum and tungsten by methods of cyclic voltammetry, electrolyses from halide-oxide melts at temperature 550 {degree sign}C. Conditions of joint electroreduction of fluoride complexes of tungsten and molybdenum, carbon dioxide and ions of nickel and cobalt in halide-oxide melts are found at temperature 550 {degree sign}C. Optimum conditions of obtaining of metallic tungsten and molybdenum, carbides of tungsten (molybdenum), double carbides tungsten with nickel (cobalt) from halide-oxide melts are determined.