In order to improve the oxygen evolution activity of Ni anode and decrease its oxygen evolution potential,the PbO_2 coating anodes with different current densities are prepared by electroplating technology at room temperature.The surface morphology and crystal structure of the PbO_2 coatings are characterized by SEM and XRD. The electrochemistry performances of the PbO_2 coatings with different current densities are analyzed by CV and LSV technologies.Moreover,the galvanizing tank voltages are determined un...