BASIC CHARACTERISTICS OF THE COMPLEX CITRATE ELECTROLYTES ON THE BASIS OF IRON (III) FOR OBTAINING THIN-LAYER GALVANIC COATINGS

Abstract

The article presents the results of studies of basic parameters of complex citrate electrolytes based on iron (III) for the application of ternary alloys with cobalt and molybdenum. The aim of the work was to determine the performance of the electrolyte, such as stability, viscosity, electrical conductivity and buffer capacity, as well as to establish the dependence of their change under the action of an important external factor - temperature. Using the conductometric method, it was found that with an increase in temperature the electrical conductivity of electrolytes predictably grows, and the solutions under study are strong electrolytes. The obtained values of the activation energy of conductivity are in the range of 694–965 J/mol. The dependence of the viscosity of electrolytes on temperature is established, the change of which also agrees with the fundamentals of the theory of electrolyte solutions. Based on the results obtained, the activation energy of the molecular jump is determined. Titrimetric studies evaluated the buffer properties of citrate electrolytes and compared the results obtained with the properties of known electrolytes for electrodeposition of electroplated coatings with alloys of a different composition.