2026-06-27T22:25:15Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/47462023-08-25T15:43:44Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Olmo Martínez, Rubén del author Tiringer, U. author Milosev, I author Visser, P. author Arrabal Durán, Raúl author Matykina, Endzhe 2023-06-16T14:20:31Z 2023-06-16T14:20:31Z 2021-08-15 0257-8972 10.1016/j.surfcoat.2021.127251 https://hdl.handle.net/20.500.14352/4746 https://doi.org/10.1016/j.surfcoat.2021.127251 https://www.sciencedirect.com/science/article/pii/S0257897221004254#bi0005 The effect of the presence of an anodic film and hybrid sol-gel coating loaded with corrosion inhibitors was evaluated as a strategy for enhanced barrier and active corrosion protection of aluminium alloy 2024-T3. In this study, AA2024-T3 specimens were anodized in a modified sulphuric-citric acid bath (SCA) as the first layer of a corrosion protective multilayer system and subsequently protected by the application of silica-based hybrid sol-gel coatings. These coatings were doped with LiNO3 and Ce(NO3)3 as corrosion inhibitors and studied in comparison with the inhibitor-free sol-gel coating in terms of morphology, composition and corrosion protection of intact and scribed specimens. The anodized AA2024-T3 with an overlaying inhibitor-free sol-gel coating showed the highest impedance modulus during long-term immersion in 0.1 mol·L−1 NaCl aqueous solution. Active corrosion protection of scribed coated specimens was studied by exposure to a 0.5 mol·L−1 NaCl solution and evaluated by surface analytical techniques. The addition of Li- and Ce-based salts into the hybrid sol-gel formulation showed active corrosion protection compared to the inhibitor-free scribed hybrid sol-gel coating. The Ce-doped sol-gel coating showed less visual corrosion and higher active corrosion protection than the Li-containing one during the long-term immersion test in 0.5 mol·L−1 NaCl. Present findings reveal that the combination of the anodic/hybrid sol-gel layers on AA2024-T3 enhances the corrosion protective properties barrier properties of both stand-alone systems and the incorporation of Li- and Ce-based inhibitors provide active corrosion. eng Atribución 3.0 España Hybrid sol-gel coatings applied on anodized AA2024-T3 for active corrosion protection journal article URL https://docta.ucm.es/bitstreams/83b992d1-5c76-4602-a187-a2bacde99a6a/download File MD5 8c1a05213bf95559947653b08974ea22 5478407 application/pdf 1-s2.0-S0257897221004254-main.pdf URL https://docta.ucm.es/bitstreams/7dbebe88-5861-4dc9-aaa4-21e29631a4f8/download File MD5 454ce4f5141efb9dfe8fb0926ba83f1d 82612 text/plain 1-s2.0-S0257897221004254-main.pdf.txt