The electrodeposition of Pb–Sn alloys from a tartrate-alkaline plating bath can lead to a deposition of pure lead or a normal codeposition of lead–tin depending on the deposition potential. The percentage of tin in the Pb–Sn deposit obtained at ∼−1.15V increases from 4.08wt.% to 20.7wt.% as the charge density rises from 2.5Ccm−2 to 5.0Ccm−2 and then decreases from 12.07wt.% to 7.52wt.% as the charge density rises from 7.5Ccm−2 to 10.0Ccm−2. SEM images show that the Pb and Pb–Sn deposits obtained from a tartrate-alkaline bath did not, in general, show dendritic growth. X-ray analysis of the deposits obtained at −0.83V with 5.0Ccm−2 or 10.0Ccm−2 indicated the presence of Pb and Pb2PtO4 and the absence of Sn. However, those obtained at −1.15V and the same charge densities (q d) showed the presence of Pb, Pb2SnO4, PbSnO3 and PtSn4. The Pb2PtO4 and PtSn4 compounds were formed because the electrodeposition process occurred onto Pt substrate.