%0 journal article
%@ 0010-938X
%A Vaghefinazari, B., Wang, C., Mercier, D., Mei, D., Seyeux, A., Marcus, P., Blawert, C., Lamaka, S.V., Zheludkevich, M.L.

%D 2021
%J Corrosion Science

%P 109830 
%R doi:10.1016/j.corsci.2021.109830
%T Adverse effect of 2,5PDC corrosion inhibitor on PEO coated magnesium
%U https://doi.org/10.1016/j.corsci.2021.109830
 
%X Besides their noteworthy tribological and corrosion protection properties, Plasma Electrolytic Oxidation (PEO) coatings feature a porous microstructure that is able to host corrosion inhibitors. This study reveals that although 2,5pyridindicarboxylate (2,5PDC) shows a remarkable corrosion inhibition effect for bare AZ21 Mg alloy, it can extensively deteriorate a PEO coating on the same Mg substrate, resulting in an overall accelerated failure of the PEO-coated AZ21 alloy. The deteriorative behavior of 2,5PDC towards PEO-coated AZ21 is explained based on the characterization of the bare and PEO-coated AZ21 exposed to the NaCl electrolyte with and without inhibitor using EIS, SEM, STEM and ToF-SIMS.