Study on Degreasing by Electrolyzed Reduced Water for Cutting Surface of Carbon Steel

This paper describes degreasing of carbon steel cutting surface using electrolyzed reduced water, which is obtained in cathode compartment by electrolysis of dilute NaCl solution. The electrolysis was carried out using diaphragm type electrolyzer with Pt electrodes. Using the electrolyzed reduced (cathode) and oxidized (anode) water, the effect of corrosion on carbon steel was investigated, and the efficiency of emulsification, decomposition and solubility of oil by electrolyzed reduced water was investigated. Then, the efficiency of electrolyzed reduced water as detergent was studied, and compared to pure water, trichloroethylene and tetrachloroethylene. As result of the study, following could be identified. (1) Electrolyzed oxidized water eats into carbon steel, but electrolyzed reduced water do not eats into cutting surface of carbon steel. (2) The best temperature of electrolyzed reduced water for degreasing is at 60°C efficiently. (3) The efficiency of degreasing with the electrolyzed reduced water is the half of that of trichloroethylene and tetrachloroethylene, but longer treatment of degreasing enables to work in equivalent level.