Therefore, this change that occurs on the surface of the working electrode during the PDP test may make it difficult to evaluate the original anti-corrosion tendency of the sample. This view is consistent with other reports [25,43,44], claiming that the PDP test is not suitable for comparing the corrosion performance of Mg because of the dynamic process that occurs in the polarized surface and the adjacent electrolyte. Therefore, the EIS results discussed in Section 3.4.2 provide a more reliable estimate of corrosion resistance for the studied samples.
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