Study on the degradation mechanism of cathode in electrochemical water descaling

Abstract

Abstract This article studies the degradation mechanism of cathode descaling efficiency in the electrochemical water descaling process. The prolonged reaction causes many calcium carbonate crystals to adhere to the surface of the electrode plate. It results in significant degradation of the descaling efficiency and eventually approaches 0. This paper focuses on the interactive effects of multiple factors on the degradation of electrochemical water softening descaling efficiency. The results show that when the DC voltage exceeds 20V, the degradation process of descaling efficiency of the electrode plate is prolonged and self-cleaning occurs. The hardness removal amount is increased by 20%. Supported by the LSI and RSI indices, voltage current density and mesh size directly affect the degradation of descaling efficiency. The main reason for the increase of unit energy consumption is the thicker scale, which leads to the decrease of scale removal efficiency between cathode and anode.Combined energy consumption per unit and degradation of descaling efficiency, using a mesh size of 1 mm×3 mm, can reduce the unit energy consumption by 18.75%, effectively prolonging the degradation of descaling efficiency.