The influence of Zr substitution for Nb on the corrosion behaviors of the Ni-Nb-Zr bulk metallic glasses

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	The influence of Zr substitution for Nb on the corrosion behaviors of the Ni-Nb-Zr bulk metallic glasses
	D. K. Li; Z. W. Zhu; H. F. Zhang; A. M. Wang; Z. Q. Hu
	2012
发表期刊	Science China-Physics Mechanics & Astronomy
ISSN	1674-7348
卷号	55 期号:12 页码:2362-2366
摘要	The influence of Zr content on corrosion behaviors of the Ni61.5Nb38.5-x Zr (x) (x=1, 3, 5, 7, 9 at.%) bulk metallic glasses (BMGs) in 1 M HCl aqueous solution was investigated by potentiodynamic polarization measurements and X-ray photo-electron spectroscopy (XPS). It was found that these BMG alloys possess superior corrosion resistance, that is, with large passive region of about 1.5 V and low passive current density (as low as 0.05 Am-2 for Ni61.5Nb31.5Zr7). XPS analysis indicates that the high corrosion resistance is attributed to the formation of Nb- and Zr-enriched surface films formed in the aggressive acid solution. The Zr substitution for Nb effectively reduces the Ni content, particularly the metallic state Ni content in the surface films, which depresses the electrical conduction of the surface films and reduces the passive current density, thus leading to the enhancement of the corrosion resistance of these Ni-Nb-Zr BMGs. These alloys may potentially be useful for engineering applications.
部门归属	[li dengke; zhu zhengwang; zhang haifeng; wang aimin; hu zhuangqi] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [li dengke] chinese acad sci, grad sch, beijing 100039, peoples r china.;zhang, hf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;hfzhang@imr.ac.cn
关键词	Bulk Metallic Glasses Corrosion Resistance X-ray Photoelectron Spectroscopy Forming Ability Mechanical-properties Thermal-stability High-strength Alloys Resistance Ti Elements System Al
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60051
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. K. Li,Z. W. Zhu,H. F. Zhang,et al. The influence of Zr substitution for Nb on the corrosion behaviors of the Ni-Nb-Zr bulk metallic glasses[J]. Science China-Physics Mechanics & Astronomy,2012,55(12):2362-2366.
APA	D. K. Li,Z. W. Zhu,H. F. Zhang,A. M. Wang,&Z. Q. Hu.(2012).The influence of Zr substitution for Nb on the corrosion behaviors of the Ni-Nb-Zr bulk metallic glasses.Science China-Physics Mechanics & Astronomy,55(12),2362-2366.
MLA	D. K. Li,et al."The influence of Zr substitution for Nb on the corrosion behaviors of the Ni-Nb-Zr bulk metallic glasses".Science China-Physics Mechanics & Astronomy 55.12(2012):2362-2366.