The effect of Pt and Pd alloying additions on the corrosion behavior of titanium in fluoride-containing environments

Nakagawa, Masaharu; Matono, Yoshinari; Matsuya, Shigeki; Udoh, K.; Ishikawa, Kunio

doi:10.1016/j.biomaterials.2004.07.022

Cited by 91 publications

(64 citation statements)

References 25 publications

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“…When the pH of the buffer was increased to 5.0, the voltammetric curve of Ti6Al4V ( Figure 5) shows an active to passive transition with current densities of about 300 µA.cm -2 , in accordance with what was reported for Ti6Al4V in fluoride containing salivas with pH 5.0 [8][9][10] . The current densities decrease to about 100 µA.cm -2 at pH 7.6 showing a passive behavior with a current almost constant indicating the film growth, and a small cathodic peak appears around -0.8 V. These facts are in a good agreement with the literature indicating that Ti and its alloys are passive in fluoride containing media with pH > 5.0 [5,6,9] .…”

Section: Resultssupporting

confidence: 86%

“…Ti grade 2 presented the same behavior (data not shown). These results indicate that the onset of the dissolution process starts at pH < 5.0 which is in good agreement with previous data reported in the literature 5,9,10 . Surface analysis of Ti grade 2 by SEM showed significant surface destruction after 4 days immersion in citric acid containing 0.1 M NaF (Figure 2a).…”

Section: Methodssupporting

confidence: 93%

“…The EDS analysis found only Ti presence. According to Nakagawa 9,10 , there are limits of fluoride contents and pH values at which the corrosion behavior of Ti changes drastically.…”

Section: Methodsmentioning

confidence: 99%

“…Solutions containing more than 20 ppm of fluoride ions may attack Ti surfaces when the pH falls below 6.0 [3] . It is well known that the corrosion and pitting processes on Ti-based alloys depend on the fluoride content and the pH of the media [4][5][6][7][8][9][10] . Previous works reported that the dissolution of the oxide passive film occurs on Ti grade 2 and Ti6Al4V in fluoride containing citric acid 4 .…”

Section: Introductionmentioning

confidence: 99%

“…According to Huang 8 , an increase in fluoride ion concentration leads to a decrease of the corrosion resistance of Ti6Al4V alloy in acid artificial saliva at pH 5.0 and 37 °C. Moreover, in acidic solutions the fluoride ions form HF and a concentration over 30 ppm results in destruction of the TiO 2 passive film 9,10 . NaF and other fluoride compounds are commonly employed in dental treatments.…”

Section: Introductionmentioning

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: 86%

Section: Methodssupporting

confidence: 93%

“…The EDS analysis found only Ti presence. According to Nakagawa 9,10 , there are limits of fluoride contents and pH values at which the corrosion behavior of Ti changes drastically.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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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New Kind of Titanium Alloys for Biomedical Application

Zheng

Zhang

Benli

et al. 2012

Integrated Biomaterials for Biomedical Technology

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Suppression of fluoride‐induced corrosion of titanium by albumin in oral modified environment

et al. 2008

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Although titanium was corroded by fluoride in the oral environment, influence of the protein on the corrosion was not clarified in detail. The objective of this study was to investigate suppression of fluoride-induced corrosion of titanium where albumin was either present in a solution or where albumin was pre-adsorbed on titanium. Titanium dissolution in titanium specimens and surface characterization of each specimen were determined. Dissolution in a saline solution containing both albumin and fluoride was less than that in only fluoride-containing saline solution. The titanium specimen was covered in an albumin film. The morphology of the titanium in the fluoride-containing saline solution revealed jagged edges, whereas titanium immersed in the saline solution containing albumin and fluoride showed a round and plate-like morphology. When albumin-adsorbed titanium was immersed in a fluoride-containing solution, dissolution within 6-h immersion was less than that in non albumin-adsorbed titanium. Dissolution increased with desorption of adsorbed-albumin from the titanium surface. The results suggest that albumin in a solution suppresses dissolution of titanium compounds, thus influencing their morphology.Albumin adsorbed on titanium reduces fluoride attack and suppresses dissolution.(181 words)

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The effect of Pt and Pd alloying additions on the corrosion behavior of titanium in fluoride-containing environments

Cited by 91 publications

References 25 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

New Kind of Titanium Alloys for Biomedical Application

Suppression of fluoride‐induced corrosion of titanium by albumin in oral modified environment

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