Moreno Turiegano, LaraMohedano Sánchez, MartaArrabal Durán, RaúlRoríguez-Hernández, JuanMatykina, Endzhe2024-09-202024-09-202023-06-011. Moreno, L.; Mohedano, M.; Arrabal, R.; Rodríguez-Hernández, J.; Matykina, E. Development of hybrid hierarchical coatings on Mg3Zn0.4Ca alloy for orthopaedic implants. Journal of Materials Research and Technology 2023, 24, 5823–5838 DOI:10.1016/j.jmrt.2023.04.1852238-785410.1016/j.jmrt.2023.04.185https://hdl.handle.net/20.500.14352/108285A hybrid hierarchical coating (HHC) biodegradable system, consisting of a ceramic (PEO) and a biodegradable microporous polymeric (PLA or PCL) layers, was developed on Mg3Zn0.4Ca alloy and evaluated under quasi-in vivo conditions. The polymer top-coat was produced using the Breath Figures approach by dip-coating the PEO treated ceramic surface onto a PLA/PCL polymer solution and withdraw under high relative humidity. According to our findings, when the polymer coating is applied directly onto the PEO layer using high humidity a negligible corrosion protection was observed. However, this issue was overcome by first applying a thin sealing polymer layer before the microporous polymer layer prepared by dip-coating in the absence of moisture. The HHC system improves the corrosion resistance by 10–12 times compared to the stand-alone PEO coating and, due to its inherent porosity, should be amenable for further functionalization with pharmaceutical agents.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal articlehttps://www.sciencedirect.com/science/article/pii/S2238785423008803open access66Hybrid coatingsMagnesiumPolymerBiodegradablePlasma electrolytic oxidationMicroporous surfaceQuímica3312 Tecnología de Materiales3303 Ingeniería y Tecnología Químicas