However, in the case of the AZ31-12Li alloy, some fluctuations were observed, which might be caused by instability of the Mn-containing layer formed on the surface of the alloy and its partial delamination or occurrence of cracks, discussed below in the following sections of the contribution. When comparing the spectra obtained by EIS and DEIS techniques at the same inhibitor concentrations (Fig. in Supplementary Information), EIS measurements typically gave higher impedances. On one side it is connected with different immersion times before EIS and DEIS measurements but at the same time gives some evidence that the classical EIS approach might