The SEM images of the surfaces of AZ31-xLi alloys after 24 h of exposure to the sodium chloride solution with 150 mM of the inhibitor are shown in Fig. . All examined surfaces showed rather different morphologies. The surface was unevenly covered by surface protective layers. The formed layers have some microcracks that are typical for ex-situ observation of Mn-rich surface layers on Mg or Al alloys and are associated with internal stresses in these layers caused by the conditions of the SEM measurements . The elemental analysis of these precipitates (Figs. S6-S8 in the Supplementary Information) confirmed that they are rich in Mn, Mg, O, K, and Na, suggesting that the surface Mn-rich oxides were formed on the surface. No sign of severe local corrosion, predicted from the SKPFM measurements (Fig. ) and observed in uninhibited conditions (shown in ), was noted.