Effect of annealing below the crystallization temperature on the corrosion behavior of Al-Ni-Y metallic glasses

被引：69
|
作者：
Jindal, R. [1 ,2 ,5 ]
Raja, V. S. [2 ]
Gibson, M. A. [3 ]
Styles, M. J. [3 ]
Bastow, T. J. [4 ]
Hutchinson, C. R. [5 ]
机构：
[1] IITB Monash Res Acad, Bombay, Maharashtra, India
[2] Indian Inst Technol, Dept Met Engn & Mat Sci, Bombay 400076, Maharashtra, India
[3] CSIRO Proc Sci & Engn, Clayton, Vic 3168, Australia
[4] CSIRO Mat Sci & Engn, Clayton, Vic 3168, Australia
[5] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia
来源：
CORROSION SCIENCE | 2014年 / 84卷
关键词：
Aluminum; Polarization; EIS; Amorphous structures; Segregation; Passivity; IRREVERSIBLE STRUCTURAL RELAXATION; ALLOYS; DEVITRIFICATION; PASSIVATION; RESISTANCE; PASSIVITY; KINETICS;
D O I：
10.1016/j.corsci.2014.03.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of thermally-induced surface segregation on the electrochemical corrosion behavior of Al-Ni-Y amorphous alloys was investigated by potentiodynamic polarization and electrochemical impedance techniques. Annealing below the crystallization temperature at 150 degrees C for 5 min caused a reduction in passive current density and improved polarization resistance. Synchrotron X-ray diffraction patterns showed no change in structure while nuclear magnetic resonance spectra confirmed no change in chemical ordering or structural relaxation within the glass. The surface segregation of yttrium, as confirmed by X-ray photoelectron spectroscopy, after annealing below the crystallization temperature is proposed to be responsible for the improved passivity. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：54 / 65
页数：12
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