Alloying Element Depletion and Phase Transition in Stainless Steel 304 Induced by PEO Treatment in KOH- and TaOH-Rich Electrolyte

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorde Proença, João Paulo-
Autor(es): dc.creatorRibeiro, Rafael Parra-
Autor(es): dc.creatorRangel, Elidiane Cipriano-
Autor(es): dc.creatorda Cruz, Nilson Cristino-
Autor(es): dc.creatorPinto, Bruna de Oliveira-
Autor(es): dc.creatorGrandini, Carlos Roberto-
Autor(es): dc.creatorCorrea, Diego Rafael Nespeque-
Data de aceite: dc.date.accessioned2025-08-21T18:04:28Z-
Data de disponibilização: dc.date.available2025-08-21T18:04:28Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2023-10-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3390/cryst13101480-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/300712-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/300712-
Descrição: dc.descriptionDue to their lower cost and good mechanical and corrosion properties, ferrous materials such as stainless steel (SS) are commonly used as bio-materials, mainly as surgical instruments and implants. Surface treatments such as plasma electrolytic oxidation (PEO) can be a valuable tool to increase corrosion resistance and enhance the bio-compatibility of metallic materials. In this scenario, the current study evaluated the effect of electrolyte composition on the surface of SS304 submitted to PEO treatment. The variation in the amount of KOH and Ta(OH)5 promoted significant changes in the surface characteristics, forming Fe-rich oxide plates, Ta-rich agglomerate particles, and an exposed substrate. The PEO-treated substrates were depleted of some alloying elements (Cr, Ni, and Mn), which, allied to the Ta-enrichment, affected the roughness, wettability, phase stability, micro-hardness, and corrosion resistance. All the PEO treatments presented a phase composition of single γ-Fe instead of a dual α + γ phase from the untreated substrate, which was understood in terms of the Nieq-Creq diagram. The corrosion tests indicated that the PEO treatment significantly affected the corrosion parameters, having the presence of a non-uniform oxide layer. The findings show that it is possible to control the chemical and phase composition of SS304 material employing PEO treatment.-
Descrição: dc.descriptionLaboratório de Plasmas Tecnológicos Science and Technology Institute São Paulo State University (UNESP), SP-
Descrição: dc.descriptionLaboratório de Anelasticidade e Biomateriais School of Sciences São Paulo State University (UNESP), SP-
Descrição: dc.descriptionLaboratório de Plasmas Tecnológicos Science and Technology Institute São Paulo State University (UNESP), SP-
Descrição: dc.descriptionLaboratório de Anelasticidade e Biomateriais School of Sciences São Paulo State University (UNESP), SP-
Idioma: dc.languageen-
Relação: dc.relationCrystals-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectcorrosion-
Palavras-chave: dc.subjectplasma electrolytic oxidation-
Palavras-chave: dc.subjectstainless steel-
Palavras-chave: dc.subjecttantalum oxide-
Título: dc.titleAlloying Element Depletion and Phase Transition in Stainless Steel 304 Induced by PEO Treatment in KOH- and TaOH-Rich Electrolyte-
Tipo de arquivo: dc.typelivro digital-
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