NEW VIEW ON GALVANICS OF CHROMIUM PLATING

The paper shows the opportunity and gives the concrete results of the application of the method of tenzoimpulse regulation of physical and chemical processes in the nonequilibrium condensed mediums to the kinetics analysis for the definition purpose of difficult electrochemical transformations mechanisms on the example of chromato-sulfate galvanic chromium plating. Regulation of macroscopically heterogeneous processes in the condensed mediums provides synchronization of the self-organizing dissipative structures without affecting the mechanism, thermodynamics and kinetic topology of controlled processes. It is observed the selective resonant increase of speed constant along the corresponding trajectory of chemical reaction with essential acceleration of mass and heat exchange. Moreover, this paper explicates the mechanism of electrolytic cathodic chrome restoration which does not assume spontaneous dissociation of the solution components. The authors of this study consider the solvated electron, delivered via the cathode in solution by the electromotive force (EMF source), as a complete reagent. The paper explains the mechanism of the trivalent chrome compounds emergence during electrolysis and shows their role in the general cathodic process, function of the allocated hydrogen in the general mechanism of electrolytic chromic acid restoration, catalytic effect of sulfuric acid, growth of chrome exit on current at decrease of electrolyte temperature and increase of cathodic current density, and also at reduction of chromic anhydride concentration in electrolyte. The paper is intended for process engineers, research associates, experts in the field of materials science, various areas of physical and applied chemistry, and also everybody who is interested in electrochemistry problems.

chromium plating, cathodic emission of electrons, solvated electron, reactionary zone, mesophase, cathodic film, electron and hole conductivity, vortex dissipative structure, tenzoimpulse regulation, synchronization

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