Electrochemical behavior of Ti–Cr alloys in artificial saliva

Hsu, Hsueh-Chuan; Wu, Shih-Ching; Wang, Chengfeng; Ho, Wen-Fu

doi:10.1016/j.jallcom.2009.07.172

Cited by 24 publications

(9 citation statements)

References 11 publications

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“…This is also in agreement with previous findings in which Ti-20Cr-X alloys showed better corrosion resistance than that of c.p. Ti in artificial saliva containing NaF, and was especially true for the Ti-20Cr-Mo alloy [19]. These results confirm the findings presented above that the addition of Mo to pure Ti increases its corrosion resistance due to a lower current density [25].…”

Section: Potentiodynamic Polarization Studies Of the Ti Alloyssupporting

confidence: 89%

“…The choice of this base electrolyte was based on a previous report by Hsu et al [19], and the composition of the artificial saliva was (NaCl 400 mg L -1 , KCl 400 mg L -1 , CaCl 2 Á2H 2 O 795 mg L -1 , NaH 2 PO 4 ÁH 2 O 690 mg L -1 , KSCN 300 mg L -1 , Na 2 SÁ9H 2 O 5 mg L -1 , and urea 1000 mg L -1 ). The pH level of the test solution was adjusted to 4.0 by adding lactic acid in a simulated oral environment.…”

Section: Electrochemical Testsmentioning

confidence: 99%

“…Significantly, the average corrosion potentials estimated from the linear polarization curves (-912 to -1073 mV) were significantly lower than those obtained from the OCP measurements (-473 to -654 mV). This is because the polarization tests were started at a cathodic potential close to the corrosion potential, and the passive film on the surface was subtracted [19]. Furthermore, this study has shown that alloying elements (Nb, Mo, Zr, and Fe) can shift an alloy's corrosion potential to more noble values, especially in the case of Ti-20Cr-Mo, where the strong shift in the positive direction indicates that the corrosion resistance of Ti-20Cr-Mo is superior to those of other Ti-20Cr-X alloys.…”

Section: Potentiodynamic Polarization Studies Of the Ti Alloysmentioning

confidence: 99%

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Electrochemical behavior of Ti-20Cr-X alloys in artificial saliva containing fluoride

Lin

et al. 2010

J Appl Electrochem

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In this study, electrochemical investigation was carried out on commercially pure titanium (c.p. Ti) and as-cast Ti-20Cr-X (X = Nb, Mo, Fe, and Cr) in fluoride solutions containing artificial saliva. Open-circuit potential (OCP) and potentiodynamic polarization measurement were used to characterize the electrochemical behavior, and X-ray photoelectron spectroscopy (XPS) was used to characterize the composition of the passive films on the samples. The OCP results indicated that all specimens presented spontaneous passivation. XPS results showed that pre-test, a passive film consisting of TiO 2 and Cr 2 O 3 formed on the surface of the Ti-20Cr-X alloys, and Na 2 TiF 6 formed on the surface of all specimens after the polarization test in artificial saliva with 0.5 wt% NaF. Although the Ti-20Cr-X alloys exhibited a Na 2 TiF 6 film on their surface, their corrosion rate was still lower than that of c.p. Ti. In particular, Ti-20Cr-Mo alloy exhibited the lowest steady state current density compared to c.p. Ti and the other Ti-20Cr-X alloys. All these results suggest that the Ti-20Cr-X alloys hold promise for application as dental materials in a natural oral environment where NaF may be present.

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Section: Potentiodynamic Polarization Studies Of the Ti Alloyssupporting

confidence: 89%

Section: Electrochemical Testsmentioning

confidence: 99%

Section: Potentiodynamic Polarization Studies Of the Ti Alloysmentioning

confidence: 99%

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Electrochemical behavior of Ti-20Cr-X alloys in artificial saliva containing fluoride

Lin

et al. 2010

J Appl Electrochem

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“…However, many complain about the insufficient strength and poor wear resistance of unalloyed Ti ( Ref 1,2). Ti alloys, such as Ti-Cu (Ref 2-4), Ti-Ag ( Ref 4,5), Ti-Mo (Ref 6, 7), Ti-Cr ( Ref 1,[8][9][10], Ti-Zr ( Ref 11,12), and Ti-Sn (Ref [13][14][15], have been considered for dental applications and their mechanical properties have been studied.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Machinability of Cast Ti-Si Alloys with Varying Si Content

Hsu

et al. 2016

J. of Materi Eng and Perform

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This study evaluated the machinability of a series of binary Ti-Si alloys with a goal of developing a titanium alloy with better machinability than commercially pure titanium (c.p. Ti). The alloys were slotted using a milling machine and end mills under four cutting conditions. Machinability was evaluated through cutting force. The experimental results indicate that alloying with Si significantly improved the machinability of c.p. Ti in terms of cutting force under the present cutting conditions. As the Si content increases, the cutting force decreases then greatly increases. The cutting forces of c.p. Ti and the Ti-Si alloys increased as the feed rate increased from 30 to 60 m/min under the cutting speed of 55 or 110 m/min. The cutting force of Ti-5Si at cutting speed 55 m/min was approximately 49% lower than that of c.p. Ti; at cutting speed 110 m/min, it was approximately 62% lower than that of c.p. Ti. The cutting force of Ti-10Si was significantly higher than those of the other Ti-Si alloys and c.p. Ti, a result that can be explained by a higher degree of hardness (626 HV) and larger amounts of Ti 5 Si 3 (47.10 vol.%). For Ti-5Si, there was no obvious adhesion of chips observed on the cut surfaces. Furthermore, the specimens had the lowest surface roughness (Ra) values, approximately 0.3-0.4 lm, under the four cutting conditions. When cutting force, chip length, and surface roughness results are considered, the Ti-5Si alloy developed in this study is a viable candidate for machining.

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“…A number of research groups are working to improve the mechanical properties and corrosion behavior of titanium and its alloys, and have reported that some of these alloys (Ti-Mo, Ti-Cr, Ti-Sn and Ti-Zr) have the potential for use in dental applications [7][8][9][10][11]. Recent studies by Hsu et al have focused on titanium alloys containing Mo and Cr alloying elements, and, significantly, a series of Ti-Cr alloys with favorable mechanical properties has been found.…”

Section: Introductionmentioning

confidence: 99%