Self-healing ceria-modified coating for corrosion protection of AZ31 magnesium alloy

By Lénia M. Calado, M. Taryba, M. Carmezim, M. F. Montemor. Corrosion Science, 2018

158 citations recorded by the source corpus.

Abstract A hybrid siloxane-based coating was modified with CeO 2 nanoparticles and applied on AZ31. The corrosion protection performance was evaluated via Electrochemical Impedance Spectroscopy (EIS) in 0.05 M NaCl. CeO 2 -modified coating showed improved and more stable protective performance compared to the blank coating. Localized healing of the modified coating was studied via Scanning Vibrating Electrode Technique (SVET), Scanning Ion-Selective Electrode Technique (SIET) and Localized Electrochemical Impedance Spectroscopy (LEIS). Addition of ceria led to lower cathodic activity in 0.05 M NaCl and alkalization was kept localized. The CeO 2 -modified coating provided corrosion protection, including pre-emptive healing of localized corrosion activity, of AZ31.

Subfields: Biomaterials, Materials Chemistry, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/9e44f4120529887c9532289e53e9db13d31739a9