Fast migration of fluoride ions in growing anodic titanium oxide

Habazaki, H.; Fushimi, Koji; Shimizu, K.; Skeldon, P.; Thompson, G.E.

doi:10.1016/j.elecom.2006.12.023

Cited by 169 publications

(122 citation statements)

References 41 publications

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“…According to Habasaki and his co-workers the development of the titanium fluoride layer might be the result of the fast inward migration of fluoride ions during anodic film growth under high electric field [23]. On the other hand, the development of a titanium-fluoride layer between the anodic film and the titanium substrate may not explain alone the significant differences in the corrosion behavior of the NP and NT-2 films.…”

Section: Discussionmentioning

confidence: 99%

Investigation of the mechanical and chemical characteristics of nanotubular and nano-pitted anodic films on grade 2 titanium dental implant materials

Weszl

Tóth

Kientzl

et al. 2017

Materials Science and Engineering: C

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Section: Discussionmentioning

confidence: 99%

Investigation of the mechanical and chemical characteristics of nanotubular and nano-pitted anodic films on grade 2 titanium dental implant materials

Weszl

Tóth

Kientzl

et al. 2017

Materials Science and Engineering: C

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“…It was shown by Habazaki et al [27] that the fluoride ions migrate inwards at a rate twice that of O 2− ions. They accumulate at the interface between the alloy and anodic oxide where a thin TiF 4 layer is formed between the metal and the oxide as well as on the outer sides of the pores.…”

Section: The Transfer Of Timentioning

confidence: 96%

Electrochemical synthesis of oxide nanotubes on Ti6Al7Nb alloy and their interaction with the simulated body fluid

Stępień

Handzlik

Fitzner

2016

J Solid State Electrochem

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The aim of the present work was to investigate electrochemical behavior of the Ti6Al7Nb alloy in the simulated body fluid (SBF) containing Ca 2+ , HCO 3 − , and HPO 4 2 − ions. At first, optimal conditions necessary for oxide nanotube formation were determined. The experiments were conducted in the 1 M (NH 4 ) 2 SO 4 with 0.5 wt% NH 4 F electrolyte at room temperature. Anodization of the alloy samples was carried out under variable external voltage U in the range from 10 to 40 V at room temperature. Obtained surface morphology was examined by SEM and X-ray techniques. Nanotube diameter was calculated and correlated with the imposed voltage. Having control over the size of nanotubes, samples with the obtained nanostructures of a chosen diameter were immersed into SBF solution with pH = 7.4 for a fixed period of time. Then, they were removed from the fluid and subjected to the electrochemical investigation. Corrosion current and corrosion potential were determined, and it was found that the best anticorrosion properties were obtained for heat-treated nanotube layer: i corr = 39 nA/cm 2 and E corr = −0.236 V vs Ag/AgCl. Finally, the interaction between the oxide surface and the solution was studied using polarization and electrochemical impedance spectroscopy (EIS) techniques.

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“…The distribution of oxygen suggests that it is immobile or migrates more slowly than fluorine. Relatively fast migration of fluorine species has been reported for barrier-type anodic films formed on tantalum and titanium [26,27]. Neodymium and zinc are distributed throughout the thickness of the film, and zinc is enriched at the alloy/film interface.…”

Section: Voltage-time Behaviourmentioning

confidence: 97%

Effect of current density and behaviour of second phases in anodizing of a Mg-Zn-RE alloy in a fluoride/glycerol/water electrolyte

Němcová

Kuběna

Šmíd

et al. 2015

J Solid State Electrochem

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Anodizing of a Mg-Zn-RE alloy was carried out at constant current densities from 0.1 to 10 mA cm −2 in a fluoride/glycerol/water electrolyte. Rutherford backscattering spectroscopy, nuclear reaction analysis and analytical transmission electron microscopy revealed barrier-type films composed of oxide and fluoride species. The films were formed by outward migration of cations and inward migration of anions. The transport number of cations in the film above the matrix was in the range ∼0.5 to 0.6, and ∼0.1 in the film above the grain boundary Mg-Zn-RE phase. From the oxidation behaviour of the Zn-Zr phases, it is suggested that anions and cations migrate through short-circuit paths in the film.

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Fast migration of fluoride ions in growing anodic titanium oxide

Cited by 169 publications

References 41 publications

Investigation of the mechanical and chemical characteristics of nanotubular and nano-pitted anodic films on grade 2 titanium dental implant materials

Investigation of the mechanical and chemical characteristics of nanotubular and nano-pitted anodic films on grade 2 titanium dental implant materials

Electrochemical synthesis of oxide nanotubes on Ti6Al7Nb alloy and their interaction with the simulated body fluid

Effect of current density and behaviour of second phases in anodizing of a Mg-Zn-RE alloy in a fluoride/glycerol/water electrolyte

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