Person:
Pillado Ríos, Borja

Profile Picture
First Name
Borja
Last Name
Pillado Ríos
URI
https://hdl.handle.net/20.500.14352/76118
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Químicas
Department
Ingeniería Química y de Materiales
Area
Identifiers
UCM identifierScopus Author IDDialnet ID

Filters

2020 - 20242
Reset filters

Settings

Author: Matykina, Endzhe × Subject: 66 ×

Search Results

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Functionalization of Plasma Electrolytic Oxidation/Sol–Gel Coatings on AZ31 with Organic Corrosion Inhibitors
    (Coatings, 2024) Pillado Ríos, Borja; Matykina, Endzhe; Olivier, Marie-Georges; Arrabal Durán, Raúl; Mohedano Sánchez, Marta; Barucca, Gianni
    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.
  • Thumbnail Image
    Item
    PEO coating with Ce-sealing for corrosion protection of LPSO Mg-YZn alloy
    (Surface and Coatings Technology, 2020) Mohedano Sánchez, Marta; Perez, P.; Matykina, Endzhe; Pillado Ríos, Borja; Garcés, G.; Arrabal Durán, Raúl
    Plasma Electrolytic Oxidation coatings (PEO), without and with Ce-based sealings, were developed on a Mg–Y–Zn alloy containing long period stacking order (LPSO) phases in order to improve its corrosion behaviour. Specimens were investigated in terms of morphology, composition and corrosion behaviour (polarization and hydrogen evolution measurements). PEO improved the corrosion resistance compared to the bulk material. Sealing for 5 min plugged the coating pores and cracks with Ce-rich compounds, resulting in improved long-term corrosion behaviour. Sealing for 1 h resulted in excessive dissolution of the coating and deterioration of the inner barrier layer.