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Hybrid sol-gel coatings doped with non-toxic corrosion inhibitors for corrosion protection on AZ61 magnesium alloy Rodríguez Alonso, Luis López Sánchez, Jesús Serrano, Aída Rodríguez De La Fuente, Óscar Galván, Juan Carlos Carmona Tejero, Noemí 538.9 Graphene oxide Biocompatibility Behavior Composites Sol-gel Corrosion inhibitors L-cysteine Hanks' solution AZ61 magnesium alloy Física de materiales Física del estado sólido 2211 Física del Estado Sólido © 2022 by the authors. Licensee MDPI, The authors acknowledge the Spanish Ministry of Science and Innovation for financing the projects RTI2018-095856-B-C21 (AEI/FEDER; PIE: 2021-60-E-030, PIE: 2010-6-OE-013, and PID2019- 104717RB-I00). A.S. acknowledges the financial support from the Comunidad de Madrid for an “Atracción de Talento Investigador” contract (no. 2017-t2/IND5395). The authors acknowledge the CNME Unit of the UCM for SEM measurements. Physiological human fluid is a natural corrosive environment and can lead to serious corrosion and mechanical damages to light Mg-Al alloys used in prosthetics for biomedical applications. In this work, organic-inorganic hybrid coatings doped with various environmentally friendly and non-toxic corrosion inhibitors have been prepared by the sol-gel process for the corrosion protection of AZ61 magnesium alloys. Effectiveness has been evaluated by pH measurements, optical microscopy, and SEM during a standard corrosion test in a Hanks' Balanced Salt Solution. The results showed that the addition of an inhibitor to the sol-gel coating can improve significantly the corrosion performance, being an excellent barrier for the L-cysteine-doped hybrid sol-gel films. The incorporation of TiO2 nanoparticles, 2-Aminopyridine and quinine organic molecules slowed down the corrosion rate of the Mg-Al alloy. Graphene oxide seemed to have the same response to corrosion as the hybrid sol-gel coating without inhibitors. Ministerio de Ciencia e Innovación (MICINN)/FEDER Ministerio de Ciencia e Innovación (MICINN) Comunidad de Madrid Depto. de Física de Materiales Fac. de Ciencias Físicas TRUE pub 2023-06-22T10:41:02Z 2023-06-22T10:41:02Z 2022-01 journal article https://hdl.handle.net/20.500.14352/71355 2310-2861 10.3390/gels8010034 eng RTI2018-095856-B-C21 (PIE 2021-60-E-030; PIE 2021-60-E-030; PID2019- 104717RB-I00) 2017-T2/IND5395 Atribución 3.0 España https://creativecommons.org/licenses/by/3.0/es/ open access application/pdf MDPI