The Potential-pH relations for equilibrium adsorption of lead on chromium and iron surfaces in aqueous solutions containing dissolved Pb are calculated from recent DFT data on energies of Pb adsorption on Cr and Fe surfaces. Using these relations and relations calculated previously for Pb adsorption on Ni, Pourbaix diagrams showing the potential and pH conditions of adsorption of Pb on Ni, Cr and Fe by reduction of its dissolved species above the equilibrium potential of deposition of bulk Pb (underpotential deposition or UPD) are constructed at 25 degrees C and 300 degrees C. Overlap of the domains of stability of adsorbed Pb and Ni, Cr and Fe oxides is observed, suggesting that the formation and properties of the passive film might be affected by the presence of adsorbed Pb. This could be the cause of lead-induced stress corrosion cracking (Pb SCC) of Ni-based alloys used as tubing materials of steam generators in pressurized water nuclear reactors. (C) 2017 The Electrochemical Society.All rights reserved.