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

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2018-03, Vol.229, p.144-154
• Main Authors: Noiville, Romain, Jaubert, Olivier, Gressier, Marie, Bonino, Jean-Pierre, Taberna, Pierre-Louis, Fori, Benoit, Menu, Marie-Joëlle
• Format: Article
• Language: English
• Subjects: Boehmite; Cerium; Cerium oxides; Corrosion; Corrosion inhibitors; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrochemical techniques; Engineering Sciences; Materials; Oxide nanoparticles; Physisorption; Release; Silica; Silicon dioxide
• ISSN: 0921-5107; 1873-4944
• DOI: 10.1016/j.mseb.2017.12.026

[Display omitted] •Ce(III) loaded boehmite nanocontainers are suitable for AA 2024 corrosion protection.•Ce(III) release from boehmite nanocontainers is effective 2 weeks in corrosive medium.•EIS is efficient to ascertain inorganic inhibitor release from nanocontainers.•Dense silica nanocontainers offer higher Ce(III) loading than mesoporous ones. 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.