RT info:eu-repo/semantics/article
T1 Improvements in tribological and anticorrosion performance of porous Ti-6Al-4V via PEO coating
A1 García Cabezón, Ana Cristina
A1 Rodríguez Méndez, María Luz
A1 Amigó Borrás, Vicente
A1 Bayón, Raquel
A1 Salvo Comino, Coral
A1 García Hernández, Celia
A1 Martín Pedrosa, Fernando
K1 Ti-based alloys
K1 Corrosion
K1 Tribocorrosion
K1 Surface modification
K1 23 Química
K1 22 Física
AB Medical implants manufactured using biomaterial Ti-6Al-4V exhibit some disadvantages. Its higher elastic modulus than that of natural bone can cause stress shielding problems. This can be avoided using Ti-6Al-4V with pores in the implant structure. However, poor corrosion and tribocorrosion behaviors are yielded because of the large area exposed to the medium. To mitigate both issues, coating technologies can be applied. The plasma electrolytic oxidation (PEO) process is a cost-effective process that has been used successfully in nonporous Ti alloys. In this study, two PEO coatings with different amounts of Ca/P are used. However, reports regarding their application in porous materials are scarce. The effects of PEO treatments on corrosion and tribocorrosion in Ti-6Al-4V powder metallurgy are analyzed herein. The porous materials provide an efficient surface for PEO coatings, as demonstrated via scanning electron microscopy (SEM) and atomic force microscopy (AFM), and the porosity of the substrates improved the adherence of the coatings. The corrosion resistance measured via electrochemical impedance spectroscopy confirmed the beneficial effect of the coatings, particularly for long exposure time. The lower roughness, small pore size, and more compact film observed in the PEO-Ca/P sample resulted in favorable tribological and corrosion properties.
PB Springer
SN 2223-7690
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/49158
UL https://uvadoc.uva.es/handle/10324/49158
LA eng
NO Friction, 2021, vol. 9, n. 5, p. 1303-1318
NO Producción Científica
DS UVaDOC
RD 19-abr-2024