Effect of niobium oxide thin film on the long-term immersion corrosion of the 2198-T851 aluminium alloy

Ferreira, M.O.A.; Gelamo, Rogério Valentim; Marino, Cláudia Eliana Bruno; Silva, Brunela Pereira da; Aoki, Idalina Vieira; Luz, M. S. da; Alexopoulos, Nikolaos D.; Leite, Natália Bueno; Moreto, Jéferson Aparecido

doi:10.1016/j.mtla.2022.101407

Cited by 14 publications

(18 citation statements)

References 30 publications

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“…The highlighted areas showed the formation of pits on the surface, suggesting a non-homogenous coating with defects, as some regions were attacked and others remained protected. This result suggested that the coating might not be best used as a surface treatment by itself, but due to its morphology, as seen in Figures 2 and 3, it could be used in conjunction with other surface treatments (Ferreira et al , 2022).…”

Section: Resultsmentioning

confidence: 99%

Niobium- and titanium-based coating for the protection of carbon steel SAE 1020 against corrosion

Helleis

Maia

Castro

et al. 2022

ACMM

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Purpose The purpose of this paper is to evaluate the protection against corrosion of carbon steel SAE 1020 promoted by a niobium- and titanium-based coating produced from a resin obtained by the Pechini method. Design/methodology/approach A resin was prepared with ammonium niobium oxalate as niobium precursor and K2TiF6 as titanium precursor. Carbon Steel SAE 1020 plates were dip coated in the resin and calcinated for 1 h at 600 ºC. Scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction were used to characterize the coating morphologically and structurally. Open circuit potential, electrochemical impedance spectroscopy, anodic potentiodynamic polarization and scanning vibrating electrode technique were used to evaluate the corrosion protection of the coating. Findings The electrochemical analyses evidence slight protection against corrosion of the coating by itself; however, the needle-like crystal structure obtained may potentially provide a good anchorage site, suggesting the coating could be used as a pretreatment that may present similar application to phosphating processes, generating lower environmental impacts. Originality/value Due to increasingly restrictive environmental laws, new environmentally friendlier surface treatments must be researched. This paper approaches this matter using a combination of niobium- and titanium-based coating, produced by a cleaner process, the Pechini method.

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Section: Resultsmentioning

confidence: 99%

Niobium- and titanium-based coating for the protection of carbon steel SAE 1020 against corrosion

Helleis

Maia

Castro

et al. 2022

ACMM

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“…The corrosion resistance of aluminium in aqueous solutions is attributed to a passive layer of alumina (Al2O3) on its surface. However, when aluminium alloys are subjected to an aggressive environment, the passive film is broken, initiating a localised corrosion process [2,3]. The 7081-T73511 aluminium alloy have already been studied by the present authors, namely in what concerns their global and localised corrosion processes and fatigue life (air, pre-corroded and salt-water fog conditions).…”

Section: Introductionmentioning

confidence: 86%

Recent Studies of Corrosion - Fatigue Crack Growth on the 7081-T73511 Aluminium Alloy

Moreto

Filho

2023

Orbital: Electron. J. Chem.

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This work aims to evaluate the effect of localized corrosion on the fatigue crack growth (FCG) resistance of the 7081-T73511 aluminium alloy. The understanding of this complex combined process was explained by the dissolution of adjacent 7081-T73511 aluminium matrix promoted by the Al7Cu2Fe second-phase particle and the crack tip interaction time with the aggressive medium. Fracture surfaces produced in air and in sea water fog at the testing conditions applied here, basically present the same appearance, with a transgranular, cleavage-like cracking mode for 8 <DK< 30 values.

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“…As mentioned by Ayerdi [10], the method of obtaining the wear volume of ASTM G133 [6] has some limitations. ASTM G133 standard [9] disregards the rounded areas of the wear track, also known as motion reversal points [11] (See Figure 3).…”

Section: Determination Of Wear Volumes By Using 3d Profilometry Techn...mentioning

confidence: 99%

“…Although titanium alloys exhibit good biological and corrosive properties, their usage is limited to load bearing applications due to their poor tribological characteristics [2]. Research regarding the development and application of niobium pentoxide (Nb 2 O 5 ) thin films on the titanium, aluminium and stainless-steel alloys has been performed by this research group in the last years [3][4][5][6][7][8]. Despite these excellent results, there is a lack of research that considers the effect of Nb 2 O 5 thin films on the wear properties of the Ti-6Al-4V alloy.…”

Section: Introductionmentioning

confidence: 99%

Development of a Low-Cost Ball-on-Flat Linear Reciprocating Apparatus: Test Validation Using Ti-6Al-4V and Ti-6Al-4V/Nb2O5 Coatings

Silva

Ferreira

Nascimento

et al. 2022

J. Mater. Sci. Technol. Res.

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This work aims to propose the development of a low-cost ball-on-flat linear reciprocating apparatus that can have the same attributes of extremely expensive equipment available on the market. For this purpose, the device was constructed following the recommendations of the ASTM G133 standard. The device’s validation was performed trough a comparative study between the ASTM G133 standard and 3D profilometry technique by using Ti-6Al-4V and Ti-6Al-4V/Nb2O5 specimens. The results obtained in the present work were very motivating by showing it was possible to obtain the wear properties with reproducibility through the equipment constructed. The wear tests showed that the functionalization of the Ti-6Al-4V alloy with Nb2O5 coatings increased the wear resistance of the biomaterial, reducing the wear volume about 80.1 % when compared to the base material. Finally, this work demonstrated (i) the effectiveness and reproducibility of the device built to carry out microwear tests, (ii) the increase in resistance to the mechanical wear process conferred by the Nb2O5 film on the Ti-6Al-4V alloy and (iii) the powerful impact of the 3D profilometry technique when compared to the ASTM G133 standard for wear volume determination.

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Effect of niobium oxide thin film on the long-term immersion corrosion of the 2198-T851 aluminium alloy

Cited by 14 publications

References 30 publications

Niobium- and titanium-based coating for the protection of carbon steel SAE 1020 against corrosion

Niobium- and titanium-based coating for the protection of carbon steel SAE 1020 against corrosion

Recent Studies of Corrosion - Fatigue Crack Growth on the 7081-T73511 Aluminium Alloy

Development of a Low-Cost Ball-on-Flat Linear Reciprocating Apparatus: Test Validation Using Ti-6Al-4V and Ti-6Al-4V/Nb2O5 Coatings

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