• Energy Research

Methods for calculating buoyancy forces in multicomponent electrochemical systems using relative ion mass coefficients are analyzed. An approximate method for determining ion mass coefficients using the available reference data on the concentration dependences of densities of individual substance solutions is developed. Ionic mass coefficients, found using this method, are tabulated. These can be used for determining buoyancy forces in electrochemical systems of various compositions.

Methods for calculating buoyancy forces in multicomponent electrochemical systems using relative ion mass coefficients are analyzed. An approximate method for determining ion mass coefficients using the available reference data on the concentration dependences of densities of individual substance solutions is developed. Ionic mass coefficients, found using this method, are tabulated. These can be used for determining buoyancy forces in electrochemical systems of various compositions.

AbstractThis work is devoted to the theoretical study of the effect of tool-electrode shape and operating conditions on the thickness uniformity of deposited and dissolved metal layer on the resistive workpieces. The Laplace's equation for the potential in the electrolyte solution, the Poisson's equation for the potential in the resistive workpiece, and the equation of metal thickness evolution were used as the mathematical model. The numerical solution was performed using the boundary element and finite element methods. The results of computer modeling demonstrate the effect of operating conditions and tool-electrode shape on the uniformity of metal electrochemical deposition and dissolution.

AbstractThis work is devoted to the theoretical study of the effect of tool-electrode shape and operating conditions on the thickness uniformity of deposited and dissolved metal layer on the resistive workpieces. The Laplace's equation for the potential in the electrolyte solution, the Poisson's equation for the potential in the resistive workpiece, and the equation of metal thickness evolution were used as the mathematical model. The numerical solution was performed using the boundary element and finite element methods. The results of computer modeling demonstrate the effect of operating conditions and tool-electrode shape on the uniformity of metal electrochemical deposition and dissolution.

An approximate analytical solution of problem of ion transfer near a vertical plane electrode surface is obtained for the metal electrodeposition proceeding at the limiting current from electrolyte containing ions of three types under the conditions of natural convection. In contrast to previous studies, no transport numbers are used here, and the migration transfer of electroactive electrolyte component is taken into account. The equations obtained take into consideration the effect of supporting electrolyte concentration and its migration on the limiting current. The limiting current densities (mass-transfer coefficients), which are calculated by equations proposed here and by the finite-difference method, are compared.

An approximate analytical solution of problem of ion transfer near a vertical plane electrode surface is obtained for the metal electrodeposition proceeding at the limiting current from electrolyte containing ions of three types under the conditions of natural convection. In contrast to previous studies, no transport numbers are used here, and the migration transfer of electroactive electrolyte component is taken into account. The equations obtained take into consideration the effect of supporting electrolyte concentration and its migration on the limiting current. The limiting current densities (mass-transfer coefficients), which are calculated by equations proposed here and by the finite-difference method, are compared.

Basic problems of metal electrochemical shaping theory are considered. Exact and approximate (quasi-steady-state, locally one-dimensional) methods for solving direct and inverse problems are analyzed. Experimental methods for improving the electrochemical shaping accuracy are considered.

Basic problems of metal electrochemical shaping theory are considered. Exact and approximate (quasi-steady-state, locally one-dimensional) methods for solving direct and inverse problems are analyzed. Experimental methods for improving the electrochemical shaping accuracy are considered.