ELECTROCHEMICAL CR DEPOSITION IN CRIII COMPLEX SOLUTION 2-STUDYING THE REDUCTION OF CR3+ COMPLEX BY CV POLARIZATION

Abstract

    An electrochemical system suitable has been developed to investigate the discharge of chromium 3+ complex with amino acetic acid, in boric acid solution + ammonium sulphate, by means of multi-cyclic polarization (Cyclic Voltammetry CV). The electrochemical system was stably discharged from 2nd polarization cycles c2. Net discharge line of 3+ chromium complex is determined from the cathodic branches of CV curves, increments between E> -1,2V / SCE, and fell sharply during that E <- 1.2 V / SCE. The maximum value of net discharge line increases with the concentration of chromium complexes in range about 0,05M to 0.5M. With more negative potential than -1.2 V / SCE the discharge of others species than chromium complex is dominant, so it almost does not depend on the concentration of chromium 3+ ions added into the solutions.