RT Journal Article
T1 Functionalization of plasma electrolytic oxidation/sol-gel coatings on AZ31 with organic corrosion inhibitors
A1 Pillado Ríos, Borja
A1 Matykina, Endzhe
A1 Olivier, Marie-Georges
A1 Mohedano Sánchez, Marta
A1 Arrabal Durán, Raúl
AB In this investigation, the sol-gel method is employed along with a corrosion inhibitor to seal a plasma electrolytic oxidation (PEO) coating, aiming to improve the long-term corrosion resistance of the AZ31 Mg alloy. Following an initial screening of corrosion inhibitors, 8-hydroxyquinoline (8HQ) is incorporated into the hybrid PEO/sol-gel system using two methods: (i) post-treatment of the PEO layer through immersion in an inhibitor-containing solution; (ii) loading the inhibitor into the sol-gel precursor. The characterization includes scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-vis), and water drop contact angle measurements. The rheological properties of the inhibitor-loaded sol-gel precursors are assessed by measuring flow curves. The corrosion processes are evaluated in a saline solution through electrochemical impedance spectroscopy (EIS) and immersion tests with unscratched and scratched specimens, respectively. The results demonstrate the successful incorporation of the inhibitor for both loading strategies. Regardless of the loading approach, systems containing 8HQ exhibit the most favourable long-term corrosion resistance.
PB MDPI
YR 2024
FD 2024-01-07
LK https://hdl.handle.net/20.500.14352/103806
UL https://hdl.handle.net/20.500.14352/103806
LA eng
NO Pillado, B.; Matykina, E.; Olivier, M.-G.; Mohedano, M.; Arrabal, R. Functionalization of Plasma Electrolytic Oxidation/Sol–Gel Coatings on AZ31 with Organic Corrosion Inhibitors. Coatings 2024, 14, 84. https://doi.org/10.3390/coatings14010084
NO 2024 Descuento MDPI
NO Ministerio de Ciencia e Innovación (España)
NO Agencia Estatal de Investigación (España)
NO European Union
DS Docta Complutense
RD 16 may 2025