Anodic oxide films formed on a Pb electrode galvanostatically and potentiostatically in 0.1 M NaOH + 0.1 M Na2SO4 solution at 80 degrees C have been investigated. Some results concerning the confirmation of initial formation of beta-PbO phase on the Pb electrode during galvanostatic and potentiostatic anodization are described. When the Pb electrode is galvanostatically anodized at 10 mA cm(-2) in 0.1 M NaOH + 0.1 M Na2SO4, initially beta-PbO phase forms. Further growth of alpha-PbO takes place only when the Pb surface is covered with beta-PbO layer. X-Ray diffraction and action spectral data clearly reveal that the formation of beta-PbO phase takes place initially, followed by the formation of other phases. Analysis of the films formed by potentiostatic anodization at -0.6 V also confirms similar observations. These results differ from the general understanding that only alpha-PbO forms on a Pb electrode in alkaline conditions during its anodization.