Effect of surface treatment on electrochemical behavior of CP Ti, Ti–6Al–4V and Ti–13Nb–13Zr alloys in simulated human body fluid

Shukla, A.K.; Balasubramaniam, R.

doi:10.1016/j.corsci.2005.06.003

Cited by 202 publications

(108 citation statements)

References 29 publications

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“…This difference may possibly be related to the presence of citric acid in the buffer producing a more defective film. These facts are in good agreement with was reported in the literature for Ti based materials [17][18][19][20][21][22] . The equivalent circuit (EC) used to describe the experimental data was based on a two-layer model consisting of a barrier inner layer and a porous outer layer [16][17][18][19][20][21] .…”

Section: Resultssupporting

confidence: 82%

“…CPE describes an ideal capacitor for n = 1, an ideal resistor for n = 0 and -1 for a pure inductor 19 . The appearance of a CPE is due to the presence of inhomogeneities in the electrode and it can be described in terms of a distribution of relaxation times, or it may arise from non-uniform diffusion 19 . The simulated data are given in Table 2.…”

Section: Eis Studiesmentioning

confidence: 99%

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Corrosion behavior of Ti and TI6Al4V in citrate buffers containing fluoride ions

Schmidt

Azambuja

2010

Mat. Res.

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The effect of fluoride ions concentration on the electrochemical behavior of Ti grade 2 and Ti6Al4V in citrate buffers was studied. Open circuit potential (OCP) measurements and voltammetric studies of the samples in the fluoride containing citrate buffers revealed a dissolution process when the pH falls below 5.0 and the NaF content is higher than 0.01 M. However, in citrate pH 7.6 the materials showed a passive behavior even in 0.1 M NaF. Some micrographs of Ti grade 2 obtained after longer immersion times in citrate pH 5.0 with 0.01 M NaF showed a surface attack. EIS (Electrochemical Impedance Sprectroscopy) data obtained at the OCP revealed that the film resistance decreases when the immersion time is increased in pH 5.0 containing 0.1 M NaF. In the citrate pH 7.6 the EIS data indicated a two-layer model of an oxide film consisting of a more compact inner layer and a porous outer layer. On the other hand, the EIS results in citrate pH 4.0 change significantly when the fluoride ions concentration increases from 0.01 to 0.05 M. The electrochemical data revealed that the corrosion behavior of Ti grade 2 and Ti6Al4V in the citrate buffers depends on the pH, the fluoride content and the exposure time.

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Section: Resultssupporting

confidence: 82%

Section: Eis Studiesmentioning

confidence: 99%

Corrosion behavior of Ti and TI6Al4V in citrate buffers containing fluoride ions

Schmidt

Azambuja

2010

Mat. Res.

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“…Here in this study, the authors made an attempt to investigate from a wear and mechanical point of view the suitability of two types of surface treatments for nickel-titanium alloy. These treatments were previously used for titanium and its alloys to improve corrosion, wear and also biological properties of the alloys for biomedical applications ( Wen et al 1998;Wang et al 2000;Hassel 2004;Rocher et al 2004;Chrzanowski et al 2005;Kokubo 2005;Mändl et al 2006;Shukla & Balasubramaniam 2006). In this study, nitinol samples were prepared in two different ways: alkali followed by thermal treatment and spark oxidation; the samples treated in both ways were compared with a ground sample that was used as a reference.…”

Section: Discussionmentioning

confidence: 99%

“…Among the methods that were previously used to improve mainly biological properties of titanium and its alloys (Ti6Al4V, Ti6Al7Nb), thermal, alkali and electrochemical treatments are of interest to the authors (Kokubo 1998;Firstov et al 2002;Chen et al 2003Chen et al , 2004Shevchenko et al 2004;Chrzanowski et al 2005;Gu et al 2005;Cheng & Zheng 2006b;Chrzanowski 2006;Shukla & Balasubramaniam 2006;Armitage & Chrzanowski 2007;Kawakita et al 2007;Wen et al 2007). Electrochemical and chemical treatment in conjunction with heat treatment improved the bioactivity through the alteration to the topography, structure and chemical composition of the surface.…”

Section: Introductionmentioning

confidence: 99%

Nanomechanical evaluation of nickel–titanium surface properties after alkali and electrochemical treatments

Chrzanowski

Neel

Armitage

et al. 2008

J. R. Soc. Interface.

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In this paper, the suitability of alkali treatment followed by heat treatment at 6008C, and spark oxidation for nickel-titanium, intended for medical applications such as pins, wires and clamps, was evaluated on the basis of nanomechanical and wear testing. In addition, the chemical composition and topography of the surface layer, wetting ability, corrosion resistance and influence of the heat treatment on structure of the alloy were also investigated. The results showed that the highest hardness was observed for alkali-treated samples, and this could be correlated with the structure of the sample that contained martensite and a higher phase transformation temperature. This treatment caused a very large increase of nickel in the top layer and decreased resistance in pitting corrosion. These results disqualified the treatment to be considered as useful for medical applications. On the other hand, the hardness of the oxidized samples was at the same level as that obtained for ground reference samples. Moreover, the oxide layer was enriched with phosphorus, and it was predominantly composed of TiO 2 and phosphorus oxides. This 3.1 mm thick layer had good adhesion to the substrate as indicated by scratch testing and wear resistant in nanowear testing. However, the oxidation did not significantly increase the corrosion resistance of the alloy compared with reference samples.

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“…The growth of an oxide layer via plasma electrolytic oxidation, local breakdown with a small spark, and the subsequent oxygen gas evolution resulted in the formation of this complicated structure [42,43]. The EIS is a very useful method for the determination of the corrosion resistance of the Ti-13Nb-13Zr alloy [30,[44][45][46][47][48]. Though Nyquist plots are relatively featureless, the Bode plots are more indicative for the changes in the electrochemical characteristics of the system during aging.…”

Section: Resultsmentioning

confidence: 99%

Anodic oxidation of the Ti–13Nb–13Zr alloy

Mosiałek

Nawrat

Szyk-Warszyńska

et al. 2014

J Solid State Electrochem

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This work presents the results of the investigations on the electropolishing and anodic oxidation of the Ti-13Nb-13Zr titanium alloy. Electropolishing was conducted in the solution containing ammonium fluoride and sulfuric acid, whereas the solution of phosphoric acid was used for anodic oxidation of the alloy. The influence of electropolishing and anodization process parameters on the texture (scanning electron microscopy (SEM)) and chemical composition (X-ray photoelectron spectroscopy (XPS)) of the surface layer was established. Electrochemical impedance spectroscopy in 5 % NaCl solution was used for the determination of the corrosion resistance of the alloy.

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Effect of surface treatment on electrochemical behavior of CP Ti, Ti–6Al–4V and Ti–13Nb–13Zr alloys in simulated human body fluid

Cited by 202 publications

References 29 publications

Corrosion behavior of Ti and TI6Al4V in citrate buffers containing fluoride ions

Corrosion behavior of Ti and TI6Al4V in citrate buffers containing fluoride ions

Nanomechanical evaluation of nickel–titanium surface properties after alkali and electrochemical treatments

Anodic oxidation of the Ti–13Nb–13Zr alloy

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