Galvanizing industry effluent contains high chloride concentrations, posing significant environmental and human health risks. In this study, a monovariable approach was employed to optimize the electrocoagulation process for the removal of chloride from galvanizing effluent using aluminum (Al) and stainless-steel (SS) electrodes in different electrocoagulation reactors. Under monopolar configuration, aluminum electrodes achieved a maximum chloride removal efficiency of 59.3% with the optimal conditions: inter-electrode spacing of 2 cm, electrolysis time of 80 min, and current of 3.01 A. Stainless steel electrodes achieved a lower efficiency of 44.58% under the following optimal conditions: inter-electrode spacing of 4 cm, electrolysis time of 20 min, and current of 1.99 A. In the dipolar configuration, aluminum electrodes demonstrated improved performance, achieving a chloride removal efficiency of 61.39% under the following optimal conditions: inter-electrode spacing of 2 cm, electrolysis time of 80 min, and current of 3.0 A. A comparison of the results indicates that the Al dipolar electrode is more suitable for treating galvanizing effluent than the Al monopolar and SS electrodes using the electrocoagulation method. Despite the superior performance of the aluminum electrodes, the achieved efficiencies do not meet the regulatory discharge limits for chlorides, highlighting the necessity of supplementary treatment methods, such as membrane filtration, to ensure compliance.