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Electrochemical characterization of nanostructured Ti-24Nb-4Zr-8Sn alloy in 3.5% NaCl solution
J. Li; S. J. Li; Y. L. Hao; R. Yang
2014
Source PublicationInternational Journal of Hydrogen Energy
ISSN0360-3199
Volume39Issue:30Pages:17452-17459
AbstractA multifunctional beta-type titanium alloy Ti-24Nb-4Zr-8Sn (Ti2448) with high strength and low elastic modulus has advantage of rapid grain refinement by conventional cold processes due to its special highly localized plastic deformation behavior. In the paper, electrochemical behavior of the cold-rolled alloy with nanostructured (NS) grains was studied in 3.5% NaCl solution by potentiodynamic polarization test, electrochemical impedance spectroscopy (EIS) measurement, Lgi-Lgt curve and Mott-Schottky analyses, as well as Xray diffraction (XRD), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) techniques. The results showed that the NS alloy has better corrosion resistance than the coarse-grained (CG) alloy because the former has more stable and thicker protective passive layer. Such dioxide layer consists of an inner barrier layer and an outer porous layer for both the CG and NS alloy whereas the NS alloy is preponderant in thickness. The passive film is n-type semiconductor and its donor density can be decreased by grain refinement. Therefore, the above positive effect can be explained by the homogeneous and dense passive film formed on the NS Ti2448 alloy due to its high density of grain boundary. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
description.department[li, j. ; li, s. j. ; hao, y. l. ; yang, r.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; hao, yl (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; ylhao@imr.ac.cn
KeywordTitanium Alloy Passive Film Nanocrystalline Electrochemical Behavior Corrosion Fine Grained Copper Corrosion Behavior Passive Film Nanocrystalline Copper Physiological Solution Titanium-alloy Resistance Ti Ti-6al-4v Size
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73267
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
J. Li,S. J. Li,Y. L. Hao,et al. Electrochemical characterization of nanostructured Ti-24Nb-4Zr-8Sn alloy in 3.5% NaCl solution[J]. International Journal of Hydrogen Energy,2014,39(30):17452-17459.
APA J. Li,S. J. Li,Y. L. Hao,&R. Yang.(2014).Electrochemical characterization of nanostructured Ti-24Nb-4Zr-8Sn alloy in 3.5% NaCl solution.International Journal of Hydrogen Energy,39(30),17452-17459.
MLA J. Li,et al."Electrochemical characterization of nanostructured Ti-24Nb-4Zr-8Sn alloy in 3.5% NaCl solution".International Journal of Hydrogen Energy 39.30(2014):17452-17459.
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