Electrochemical Obtaining of Thin Rhenium Coatings from Chloride-Sulfate Solutions

Abstract

The dependence of various factors (current density, temperature, concentration of rhenium, acidity of a solution, nature of an electrode etc.) for electrodeposition of rhenium from chloride-sulfate solutions and obtaining thin rhenium coatings were stidued. The dependence of current yield of rhenium from chloride-sulfate solutions on current density was investigated. It was determined that when current density changes by 10-25 mA/sm2 current yield of rhenium varies between 15-60% and electrolysis must be performed at low current densities to obtain thin rhenium coatings from chloride-sulfate solutions. Electrodeposition of rhenium at different temperatures was confirmed and it was determined that when the temperature increases, deposition of rhenium becomes easier, and wave height in rhenium curve rises. Studies have determined that high-quality and thin rhenium coatings are produced at 750C. The electorlyte with the following composition was proposed to obtain thin rhenium coatings from chloride-sulfate solutions. The composition of the electrolyte is as follows (mol/l): 0,01KReO4+2H2SO4+2HCl,ik=14 mA/sm2 , t=750C , pH=0,5