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In this study the efficiency of electrocoagulation by direct and alternating current in the removal of lead and zinc has been evaluated. Wastewater samples were taken from the battery building industry. In the electrochemical cell, metal iron and stainless steel rod electrodes were used and were connected together serially and monopolar to the power source. By using alternating current the removal of lead and zinc was done successfully with iron electrodes and in the current density of 6 mA/cm² which was respectively 96.7% and 95.2% and with stainless steel electrodes in current density of 8 mA/cm² was 93.8% and 93.3%. By using direct current the optimum removal of lead and zinc with iron electrodes was respectively with 97.2% and 95.5% in current density of 6 mA/cm² and with stainless steel electrodes was equal to 93.2% and 92.5% in current density of 8 mA/cm² was achieved. With alternating current the …