The electrochemical behaviour of three Pb-Sb alloys (Sb = 1.5, 2.5, 4.65%) and a commercial alloy (CA) Pb-2.5% Sb-0.25% As-0.12% Sn-0.025% Cu-0.022% Se-0.01% Bi were studied to explore the role of Sb in the presence of other alloying elements on the corrosion, self-passivation, self-discharge processes and life cycle. The self-passivation of CA is the fastest and the insulating properties of the passive layer is the highest while it is the slowest for the alloy Pb-2.5% Sb. The critical passivation current and the overpotential of O-2 and H-2-evolution reactions decrease significantly for CA in contrast to the alloy Pb-2.5% Sb. The passivity current increases in the order: Pb-4.65% Sb < Pb-1.5% Sb < Pb-2.5% Sb < CA, whereas the oxide formation efficiency increases in the order: CA < Pb-1.5% Sb < Pb-4.65% Sb < Pb-2.5% Sb. The rate of self-discharge process was found to decrease with increase of Sb % for Pb-Sb alloys and was the fastest for Ck The impedance measurements revealed that the insulating properties of the layers formed during self-discharge increased in the order: Ph < Pb-4.65% Sb < Pb-1.5% Sb < Pb-2.5% Sb < CA.