Investigating the impact of nanostructured Nb2O5-based coating on the corrosion and corrosion-fatigue resistance of 2198-T8 aluminium alloy

Rangel, Uriel Darhê Oudinot Dias; Ferreira, Murilo Oliveira Alves; Slade, Natália Bueno Leite; Gelamo, Rogério Valentim; Baptista, Carlos Antônio Reis Pereira; Pinto, Haroldo Cavalcanti; Mota, Igor; Koga, Guilherme Yuuki; Águas, Hugo Manuel Brito; Wolf, Witor; Moreto, Jéferson Aparecido

http://hdl.handle.net/10362/187541

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Rangel_at_al._2025._Investigating_the_impact_of_nanostructured_Nb2O5-based_coating_on_the_corrosion_and_corrosion-fatigue_resistance_of_2198-T8_aluminium_alloy..pdf		9.86 MB	Adobe PDF	Ver/Abrir

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Autores

Rangel, Uriel Darhê Oudinot Dias

Ferreira, Murilo Oliveira Alves

Slade, Natália Bueno Leite

Gelamo, Rogério Valentim

Baptista, Carlos Antônio Reis Pereira

Pinto, Haroldo Cavalcanti

Mota, Igor

Koga, Guilherme Yuuki

Águas, Hugo Manuel Brito

Wolf, Witor

Resumo(s)

This investigation examined the efficacy of Nb₂O₅-based coatings, deposited by using the reactive sputtering technique, on the corrosion and corrosion-fatigue behaviour of 2198-T8 aluminium alloy used as aircraft material. Global corrosion behaviour was accessed by Open Circuit Potential (OCP), Potentiodynamic Polarization curves (PPc) and Electrochemical Impedance Spectroscopy (EIS) techniques in 0.6 mol L⁻1 NaCl solution. Fatigue crack growth (FCG) tests were conducted under controlled loading conditions in both air and saline environments. Comprehensive structural and morphological characterisations were performed using advanced microscopy and spectroscopy techniques, including Atomic Force Microscopy (AFM), Scanning Electron Microscopy/Energy Dispersive X-ray Spectroscopy (SEM/EDX), Raman spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), and Electron Backscatter Diffraction (EBSD). The results unequivocally demonstrated the protective nature of the coating, significantly enhancing the alloy's durability as evidenced by corrosion and fatigue-corrosion tests. These findings underscore the substantial potential of Nb₂O₅ coatings in extending the service life of 2198-T8 aluminium alloy when subjected to aggressive environments, thereby providing invaluable data for aerospace engineering applications.

Descrição

Funding Information: Conselho Nacional de Desenvolvimento Científico e Tecnológico, 303659/2019-0, Jéferson Aparecido Moreto, 402988/2021-3, Jéferson Aparecido Moreto, 302770/2022-4, Jéferson Aparecido Moreto, 302582/2021–5, Rogério Valentim Gelamo, Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP 2024/02504-0, Jéferson Aparecido Moreto, Fundação para a Ciência e a Tecnologia (FCT), LA/P/0037/2020, Hugo Manuel Brito Águas, UIDP/50025/2020, Hugo Manuel Brito Águas, UIDB/50025/2020, Hugo Manuel Brito Águas, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Uriel Darhê Oudinot Dias Rangel and Murilo Oliveira Alves Ferreira. Publisher Copyright: © The Author(s) 2025.

Palavras-chave

Aluminium alloys Corrosion-fatigue Fatigue crack growth rate Niobium coatings Pitting corrosion Reactive sputtering General Materials Science Condensed Matter Physics Mechanics of Materials Mechanical Engineering