Zinc is extracted by Hydrometallurgy and Pyrometallurgy. The main method for zinc production is zinc electrowinning and more than 80% of zinc is producted by this method. In this research, for investigation of cathode type and main factors on cathodic polarization in zinc electrowinning,electrolye solution was made of zinc sulphate, sulfuric acid and some industrial additives. For investigation of cathode effect, alominium with high purity and 2024, 6061 and 1100 alloyes were used as a cathode. Research showed zinc deposition on 2024 alloy carried out in lower voltage.Volgage- Current diagrams for different sulfuric acid and zinc concentrations showed that increasing of acid concentration from 60 to 120 g/l coused voltage decreasing and increasing of it from 120 to 180 g/l coused increasing of voltage and energy consumption.Also increasing of zinc concentration from 10 to 50 g/l coused reduction of voltage and increasing of energy consumption and increasing more than 50 g/l decreased cell voltage. According to cathodic polarization diag rams, increasing of temperature from 25 to 50 o decreased cell voltage and increased energy consumption. Photographs of zinc deposite with Arabic gum in electrolyte, obtained high pore deposition but addition of Arabic gum with different concentration, obtained deposite without any pore and with small grain structure. Keywordes: Electrowinning, Cathodic polarization, Cathode type, Additives
