Corrosion resistance of a superelastic NiTi alloy coated with graphene–based coatings.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorAraujo, Athos Fernandes-
Autor(es): dc.creatorFerreira, Marcos Vinícius Fonseca-
Autor(es): dc.creatorFelisberto, Marcos Daniel Vozer-
Autor(es): dc.creatorSicupira, Dalila Chaves-
Autor(es): dc.creatorSantos, Leandro de Arruda-
Data de aceite: dc.date.accessioned2025-08-21T15:39:58Z-
Data de disponibilização: dc.date.available2025-08-21T15:39:58Z-
Data de envio: dc.date.issued2023-05-19-
Data de envio: dc.date.issued2023-05-19-
Data de envio: dc.date.issued2021-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/jspui/handle/123456789/16606-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S0300944022000248?via%3Dihub-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.porgcoat.2022.106727-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1021046-
Descrição: dc.descriptionThe mechanical responses under superelastic loading cycles and the corrosion protection capacity of two gra- phene–based coatings applied to a NiTi alloy were evaluated. Graphene oxide (GO) and a composite of reduced graphene oxide (rGO) incorporated in a block copolymer of styrene–ethylene–butylene–styrene (SEBS) were deposited on the substrate via dip–coating. The morphology of the coatings was characterized by scanning electron microscopy (SEM) before and after uniaxial loading cycles up to 6%. Atomic force microscopy (AFM) was also used to evaluate the roughness of the coatings, which was expressed in terms of average roughness (Ra). The corrosion behavior was studied by potentiodynamic polarization (PP), electrochemical impedance spec- troscopy (EIS), and Mott–Schottky analysis (MSA). SEM images suggested that both GO and rGO + SEBS create uniform coatings on the substrate. The measured Ra was 25 ± 3 nm for the bare NiTi, 24 ± 3 nm for the GO coated NiTi, and 8 ± 2 nm for the rGO + SEBS coated NiTi. Both coatings presented the capacity of following several superelastic cycles, maintaining their morphological integrity. PP and EIS showed that only the rGO + SEBS coating results in a significant improvement in terms of corrosion resistance. Furthermore, rGO + SEBS decreased the oxygen vacancies in the passive film when compared with the bare NiTi and GO coating.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectNickel–titanium-
Palavras-chave: dc.subjectDip–coating-
Palavras-chave: dc.subjectBiomaterials-
Título: dc.titleCorrosion resistance of a superelastic NiTi alloy coated with graphene–based coatings.-
Aparece nas coleções:Repositório Institucional - UFOP

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