Ce(III) corrosion inhibitor release from silica and boehmite nanocontainers

Romain Noiville (1) , Olivier Jaubert (1) , Marie Gressier (1) , Jean-Pierre Bonino (1) , Pierre-Louis Taberna (1) , Benoit Fori (2) , Marie-Joëlle Menu (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 Mecaprotec Industries

Electrochemical impedance spectroscopy clearly appeared as a suitable technique to investigate the releasing properties of cerium (III) loaded on silica and boehmite nanocontainers. In this way the electrochemical behavior of the AA2024-T3 was evaluated by electrochemical impedance spectroscopy in a 0.045 mol L−1 NaCl solution with nanocontainers containing the inhibitor. Results show that the inhibitor release is influenced by both the chemical nature and the morphology of the nanocontainers. The lower loading and release phenomena were observed for the mesoporous silica nanocontainers, whereas the inhibitor is liberated until 168 h from dense silica nanocontainers. Boehmite nanocontainers combine a good loading ratio with a longer release until the second week of immersion.

Mots clés: Oxide nanoparticles; Cerium; Corrosion; Electrochemical techniques; Physisorption; Release

Domaines: Matériaux

Romain Noiville, Olivier Jaubert, Marie Gressier, Jean-Pierre Bonino, Pierre-Louis Taberna, et al.. Ce(III) corrosion inhibitor release from silica and boehmite nanocontainers. Materials Science and Engineering: B, 2018, 229, pp.144-154. ⟨10.1016/j.mseb.2017.12.026⟩. ⟨hal-02020913⟩