Person:
Arrabal Durán, Raúl

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First Name
Raúl
Last Name
Arrabal Durán
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Químicas
Department
Ingeniería Química y de Materiales
Area
Ciencia de los Materiales e Ingeniería Metalúrgica
Identifiers
UCM identifierORCIDScopus Author IDWeb of Science ResearcherIDDialnet ID

Search Results

Now showing 1 - 4 of 4
  • Publication
    LDH Post-Treatment of Flash PEO Coatings
    (MDPI, 2019-05-30) Olmo, Rubén del; Mohedano Sánchez, Marta; Mingo, Beatriz; Arrabal Durán, Raúl; Matykina, Endzhe
    This work investigates environmentally friendly alternatives to toxic and carcinogenic Cr (VI)-based surface treatments for aluminium alloys. It is focused on multifunctional thin or flash plasma electrolytic oxidation (PEO)-layered double hydroxides (LDH) coatings. Three PEO coatings developed under a current-controlled mode based on aluminate, silicate and phosphate were selected from 31 processes (with different combinations of electrolytes, electrical conditions and time) according to corrosive behavior and energy consumption. In situ Zn-Al LDH was optimized in terms of chemical composition and exposure time on the bulk material, then applied to the selected PEO coatings. The structure, morphology and composition of PEO coatings with and without Zn-Al-LDH were characterized using XRD, SEM and EDS. Thicker and more porous PEO coatings revealed higher amounts of LDH flakes on their surfaces. The corrosive behavior of the coatings was studied by electrochemical impedance spectroscopy (EIS). The corrosion resistance was enhanced considerably after the PEO coatings formation in comparison with bulk material. Corrosion resistance was not affected after the LDH treatment, which can be considered as a first step in achieving active protection systems by posterior incorporation of green corrosion inhibitors.
  • Publication
    Degradation Behaviour of Mg0.6Ca and Mg0.6Ca2Ag Alloys with Bioactive Plasma Electrolytic Oxidation Coatings
    (MDPI, 2019-06-13) Moreno Turiegano, Lara; Mohedano Sánchez, Marta; Mingo, Beatriz; Arrabal Durán, Raúl; Matykina, Endzhe
    Bioactive Plasma Electrolytic Oxidation (PEO) coatings enriched in Ca, P and F were developed on Mg0.6Ca and Mg0.6Ca2Ag alloys with the aim to impede their fast degradation rate. Different characterization techniques (SEM, TEM, EDX, SKPFM, XRD) were used to analyze the surface characteristics and chemical composition of the bulk and/or coated materials. The corrosion behaviour was evaluated using hydrogen evolution measurements in Simulated Body Fluid (SBF) at 37 °C for up to 60 days of immersion. PEO-coated Mg0.6Ca showed a 2–3-fold improved corrosion resistance compared with the bulk alloy, which was more relevant to the initial 4 weeks of the degradation process. In the case of the Mg0.6Ag2Ag alloy, the obtained corrosion rates were very high for both non-coated and PEO-coated specimens, which would compromise their application as resorbable implants. The amount of F− ions released from PEO-coated Mg0.6Ca during 24 h of immersion in 0.9% NaCl was also measured due to the importance of F− in antibacterial processes, yielding 33.7 μg/cm2, which is well within the daily recommended limit of F− consumption.
  • Publication
    Manual del Profesor como Complemento a la Asignatura Laboratorio Integrado de la Titulación Grado en Ingeniería de Materiales
    (2018-06-28) Matykina, Endzhe; Arrabal Durán, Raúl; Pardo Gutiérrez del Cid, Ángel; Muñoz Sánchez, Jesús Ángel; Mohedano Sánchez, Marta; Mateo Gómez, Gerardo; Abarca García, Isabel; Sánchez Egido, Pedro Javier; Olmo Martínez, Rubén del; Llamazares Da Silva, Yanira
    El fin principal de este proyecto es la creación de un Manual del Profesor con inclusión de cuestionarios, gráficos, muestras-tipo, etc. La generación de estos recursos didácticos adicionales permitirá al profesorado del Departamento de Ingeniería Química y de Materiales, anteriormente denominado Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica, una mejor preparación de las prácticas de la asignatura Laboratorio Integrado de tercer curso del grado Ingeniería de Materiales impartido en la Facultad de Ciencias Físicas. Actualmente esta asignatura cuenta con un total de 24 prácticas, clasificadas en cuatro bloques, a saber: tratamientos térmicos de aceros, metalografía, corrosión y procesado. En este proyecto se abordarán las prácticas relativas a Anodizado, Niquelado y Cobreado correspondientes al bloque de Procesado de Materiales.
  • Publication
    Atlas Metalográfico como Recurso Didáctico en el Aprendizaje de Microestructuras de Aleaciones de Interés Tecnológico
    (Universidad Complutense de Madrid, 2017-06-19) Arrabal Durán, Raúl; Pardo Gutiérrez del Cid, Ángel; Merino Casals, María Concepción; Gómez de Castro, Consuelo; Muñoz Sánchez, Jesús Ángel; Matykina, Endzhe; Mohedano Sánchez, Marta; Mingo Román, Beatriz; Sancho Franco, Javier; Sánchez Egido, Pedro Javier; Mateo Gómez, Gerardo
    El propósito del proyecto es la creación de un Atlas Metalográfico que sirva de complemento al currículum de las asignaturas impartidas por el Dpto. Ciencia de Materiales e Ingeniería Metalúrgica en los Grados de Ingeniería de Materiales y Química.