2024-03-29T07:17:41Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/491582023-05-30T10:43:43Zcom_10324_31661com_10324_952com_10324_894col_10324_31662
Improvements in tribological and anticorrosion performance of porous Ti-6Al-4V via PEO coating
García Cabezón, Ana Cristina
Rodríguez Méndez, María Luz
Amigó Borrás, Vicente
Bayón, Raquel
Salvo Comino, Coral
García Hernández, Celia
Martín Pedrosa, Fernando
Ti-based alloys
Corrosion
Tribocorrosion
Surface modification
23 Química
22 Física
Producción Científica
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.
Ministerio de Educación y Ciencia (project RTI2018-097990-B-I00)
Junta de Castilla y León (projects VA275P18 and VA044G19)
2021-10-19T08:12:55Z
2021-10-19T08:12:55Z
2021
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Friction, 2021, vol. 9, n. 5, p. 1303-1318
2223-7690
https://uvadoc.uva.es/handle/10324/49158
10.1007/s40544-020-0480-2
1303
5
1318
Friction
9
2223-7704
eng
https://link.springer.com/article/10.1007%2Fs40544-020-0480-2
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2021 Springer
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Springer
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Hispana
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http://creativecommons.org/licenses/by-nc-nd/4.0/
UVaDOC. Repositorio Documental de la Universidad de Valladolid
https://uvadoc.uva.es/handle/10324/49158