Is niobium more corrosion-resistant than commercially pure titanium in fluoride-containing artificial saliva?

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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
发表期刊	ELECTROCHIMICA ACTA
ISSN	0013-4686
卷号	233 页码:151-166
摘要	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.; 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.
部门归属	[li, yu ; xu, jian] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Niobium Artificial Saliva Fluoride Passivation Titanium
学科领域	Electrochemistry
资助者	National Natural Science Foundation of China [51571192]
收录类别	SCI
语种	英语
WOS记录号	WOS:000398328000017
引用统计	被引频次：80[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78186
专题	中国科学院金属研究所
通讯作者	Xu, J (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式 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.