Inhibition of the oxygen evolution reaction during titanium passivation in aqueous phosphoric acid solution

Saldanha, Renata Leal; Gomes, Bhetina Cunha; Torres, Gabriel da Rocha; Lima, Brenda Raffaela de; Castro, José Adilson de; Silva, Ladário da; Ferreira, Elivelton Alves

doi:10.1007/s10008-020-04497-2

Cited by 4 publications

(8 citation statements)

References 56 publications

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“…With the same condition, it is also in the range of the values expected by Diamanti et al (2011). On the other hand, in the solution with NaF at 80V, one may interpret the curve has a change in curvature, which, in this case, it could possibly be due to a film dielectric breakdown (Saldanha et al, 2020). In this solution (with 0.6 w.t % NaF) the lower anodization constant could also be associate to the presence of fluoride ions that collaborates with the dissolution of the oxide film at all potentials applied (Kong, 2008).…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 71%

“…Besides that, in this pH value, the titanium oxide film is at passivation conditions according to the Pourbaix diagram (Robin & Research, Society and Development, v. 9, n. 11, e95791110689, 2020 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v9i11.10689 Meirelis, 2007). Fluoride and phosphate were used to incorporate those ions into oxide films during growth at high potentials (Saldanha et al, 2020). The titanium anodization procedure was carried out using Instrutherm DC electrical power supply, model FA-3003, to apply 20 V, 40 V, 60 V and 80 V for 30 s in all potentials.…”

Section: Anodization Proceduresmentioning

confidence: 99%

“…Titanium anodic films are obtained generally using either phosphoric or sulfuric acid electrolytes, and alkali solutions (Karambakhsh et al, 2011;Saldanha et al, 2020;Huang & Liu,2013;Marino et al, 2004). Characterization of the oxides films that are grown a in phosphate buffer solution of pH equal 6.5 needs to be studied more deeply (Marino et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…This technique has been used in studies about optical parameters, oxide layer thickness related to electrochemical behaviour of titanium and its alloys, mainly in acidic or alkaline environments (Mardare & Hones, 1999;Blackwood et al, 1989). Atomic force microscopy (AFM) is a well-known and widely used technique to investigate the roughness and surface topography of the samples (Saldanha et al, 2020;Huang & Liu, 2013;Zhai et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Electrochemical impedance spectroscopy (EIS), a technique used to study the metal/oxide film/electrochemical solution system (Simka et al, 2011;Diamanti & Pedeferri, 2007;Saldanha et al, 2020), was employed to evaluate the corrosion resistance and to estimate the thickness of titanium anodized oxide film. Once fluoride incorporation during anodization procedure and the coating roughness can influence the biocompatibility of oxide film on titanium, this work focuses on evaluating the surface roughness, oxide thickness, and corrosion resistance of titanium oxides film obtained at different potentials applied in a phosphate buffer solution, without NaF and with 0.6 w. t % NaF.…”

Section: Introductionmentioning

confidence: 99%

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Effect of fluoride on the thickness, surface roughness and corrosion resistance of titanium anodic oxide films formed in a phosphate buffer solution at different applied potentials

Domingues

Oliveira

Ferreira

et al. 2020

RSD

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The anodizing process and anions type present in the electrolyte during anodic oxidation are important parameters to improve oxide biocompatibility. From these parameters, it is possible to control the thickness and surface roughness of the oxide film. This control is of major importance, once blood clots can be avoided when the oxide film on the metal substrate has a small surface roughness (Ra ≤ 50 nm). In this paper, the thickness, surface roughness, and corrosion resistance of the anodized titanium film were studied in a phosphate buffer solution containing fluoride anions (0.6 w.t % NaF), at 20 V, 40 V, 60 V, and 80 V, using atomic force microscopy (AFM), spectroscopic ellipsometry (SE), and electrochemical impedance spectroscopy (EIS) techniques. It was observed that thickness and roughness tend to increase as the applied potential rises. For oxides grown in the solution without NaF, the growth rate is roughly 1.3 ± 0.2 nm/V. Surface roughness generally presents the same behaviour. Moreover, EIS and SE thickness measurements agree at 20 V and 60 V but disagree at 80 V. This may be associated with a possible dielectric breakdown at 80 V. The oxide film formed at 60 V showed the best corrosion resistance in relation to the other studied potentials. Globular structures were also observed using AFM on surfaces at 40 V, 60 V, and 80 V, which suggests oxide film nucleation. Oxide films formed in solution with NaF presented lower thickness, excellent corrosion resistance, and low surface roughness (Ra ≤ 50 nm).

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Section: Electrochemical Impedance Spectroscopymentioning

confidence: 71%

Section: Anodization Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of fluoride on the thickness, surface roughness and corrosion resistance of titanium anodic oxide films formed in a phosphate buffer solution at different applied potentials

Domingues

Oliveira

Ferreira

et al. 2020

RSD

Self Cite

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Effects of organic acid and phosphoric acid at the low-voltage stage of the high-voltage forming process for the anode dielectric film of an aluminum electrolytic capacitor

Dong,

Sun,

et al. 2024

International Journal of Electrochemical Science

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Time Evolution of the Passivation Behavior of Ti-6Al-4V in 0.5 M Sulfuric Acid

Wang¹,

Yoshida²,

Cui³

et al. 2022

J. Electrochem. Soc.

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The passivation behavior of Ti-6Al-4V alloy was studied by electrochemical and surface analyses, and a model was proposed to elucidate the connection between polarization time and properties of the passive film. Three stages of passive film growth can be divided based on the changes of current density during the formation process of passive film and the passive film grew and stabilized after polarized for 0~2000 s under 1.0 V vs. Ag/AgCl in 0.5 M H2SO4 solution. The chemical state of Ti at the topmost surface of passive film was independent of the polarization time, while the formation of oxides inside the passive film was promoted. The structure evolution of passive film was investigated by high-resolution XAS through the synchrotron radiation source. The formation and increase of thermodynamically stable rutile-TiO2 contributed to the enhancement of the impedance and corrosion resistance of passive film.

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Inhibition of the oxygen evolution reaction during titanium passivation in aqueous phosphoric acid solution

Cited by 4 publications

References 56 publications

Effect of fluoride on the thickness, surface roughness and corrosion resistance of titanium anodic oxide films formed in a phosphate buffer solution at different applied potentials

Effect of fluoride on the thickness, surface roughness and corrosion resistance of titanium anodic oxide films formed in a phosphate buffer solution at different applied potentials

Effects of organic acid and phosphoric acid at the low-voltage stage of the high-voltage forming process for the anode dielectric film of an aluminum electrolytic capacitor

Time Evolution of the Passivation Behavior of Ti-6Al-4V in 0.5 M Sulfuric Acid

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