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Is niobium more corrosion-resistant than commercially pure titanium in fluoride-containing artificial saliva?
Li, Yu; Xu, Jian; Xu, J (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2017-04-10
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume233Pages:151-166
AbstractIn this work, commercially pure niobium (c. p. Nb) was selected to study its electrochemical behaviour in artificial saliva with several concentrations of fluoride ions (F ) over a range of 0-0.24M. The chemical nature of passive layers on surface was characterised with x-ray photoelectron spectroscopy (XPS). The changes in surface topography due to F -inducedcorrosion were examined with scanning electron microscopy (SEM). For comparison, commercially pure titanium (c. p. Ti) was also investigated under identical conditions. Both c. p. Nb and c. p. Ti exhibit very good corrosion resistance in artificial saliva without F or with a low level of F showing a low passive current density (j(pass)) andhigh polarisation resistance (Rp). However, as the F concentration increases, c. p. Nb demonstrates a significantly greater corrosion resistance due to its stable passive film (mainly Nb2O5) with a thickness of several nanometres, showing a much lower j(pass) and higher Rp, with both values differing from those of c. p. Ti by over one order of magnitude. Significant differences in the corrosion behaviour between c. p. Nb and c. p. Ti can be understood from the thermodynamic perspective and the propensity of oxide dissolution. The advantage of niobium over titanium merits attention, as the c. p. Nb and Nb-based alloys are promising for further applications in dental prosthesis fabrication. (C) 2017 Elsevier Ltd. All rights reserved.; In this work, commercially pure niobium (c. p. Nb) was selected to study its electrochemical behaviour in artificial saliva with several concentrations of fluoride ions (F ) over a range of 0-0.24M. The chemical nature of passive layers on surface was characterised with x-ray photoelectron spectroscopy (XPS). The changes in surface topography due to F -inducedcorrosion were examined with scanning electron microscopy (SEM). For comparison, commercially pure titanium (c. p. Ti) was also investigated under identical conditions. Both c. p. Nb and c. p. Ti exhibit very good corrosion resistance in artificial saliva without F or with a low level of F showing a low passive current density (j(pass)) andhigh polarisation resistance (Rp). However, as the F concentration increases, c. p. Nb demonstrates a significantly greater corrosion resistance due to its stable passive film (mainly Nb2O5) with a thickness of several nanometres, showing a much lower j(pass) and higher Rp, with both values differing from those of c. p. Ti by over one order of magnitude. Significant differences in the corrosion behaviour between c. p. Nb and c. p. Ti can be understood from the thermodynamic perspective and the propensity of oxide dissolution. The advantage of niobium over titanium merits attention, as the c. p. Nb and Nb-based alloys are promising for further applications in dental prosthesis fabrication. (C) 2017 Elsevier Ltd. All rights reserved.
description.department[li, yu ; xu, jian] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
KeywordNiobium Artificial Saliva Fluoride Passivation Titanium
Subject AreaElectrochemistry
Funding OrganizationNational Natural Science Foundation of China [51571192]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78186
Collection中国科学院金属研究所
Corresponding AuthorXu, J (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Li, Yu,Xu, Jian,Xu, J . Is niobium more corrosion-resistant than commercially pure titanium in fluoride-containing artificial saliva?[J]. ELECTROCHIMICA ACTA,2017,233:151-166.
APA Li, Yu,Xu, Jian,&Xu, J .(2017).Is niobium more corrosion-resistant than commercially pure titanium in fluoride-containing artificial saliva?.ELECTROCHIMICA ACTA,233,151-166.
MLA Li, Yu,et al."Is niobium more corrosion-resistant than commercially pure titanium in fluoride-containing artificial saliva?".ELECTROCHIMICA ACTA 233(2017):151-166.
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