The analysis of the track of the OCP of examined alloys and pH of solutions (Fig. ) shows that these processes, especially the selective dissolution of lithium, are very rapid. The intensification of the process of selective dissolution of Li will also be facilitated by the formation of microgalvanic pairs between phases of the alloys with different electronegativity. However, the surface of all alloys is passivated by a layer of corrosion products within a few minutes, as evidenced by the stabilization of the OCP and further confirmed by the results of g-DEIS measurements (Fig. ). The passivation time decreased as the content of Li in the alloy increased, which might be attributed to the formation of a more protective surface films on the surface. In naturally aerated solutions, corrosion products can further react with dissolved carbon dioxide forming relatively stable carbonate surface films on reactions: