Scaling behavior of two Fe-xCr-5Si alloys under high and low oxygen pressures at 700 °C

被引：14
|
作者：
Guo, Q. Q. [1 ]
Liu, S. [1 ]
Wu, X. F. [1 ]
Liu, L. L. [1 ,2 ]
Niu, Y. [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
[2] State Grid Corp Hunan, Live Line Working Ctr, Changsha 410000, Hunan, Peoples R China
来源：
CORROSION SCIENCE | 2015年 / 100卷
关键词：
Alloy; SEM; Oxidation; Selective oxidation; FE-SI ALLOYS; HIGH-OXIDANT PRESSURES; HIGH-TEMPERATURE OXIDATION; MOST-REACTIVE COMPONENTS; A-DEGREES-C; EXTERNAL OXIDATION; TERNARY ALLOYS; INTERNAL OXIDATION; BASE ALLOYS; BCC IRON;
D O I：
10.1016/j.corsci.2015.08.034
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation of the Fe-5Cr-5Si and Fe-10Cr-5Si alloys has been examined under 1 and 10(-20) atm O-2 at 700 degrees C. In all cases the Cr additions improved the oxidation resistance of the Fe-5Si alloy by forming protective external scales rich in Cr- and Si-oxides, except for the oxidation of Fe-5Cr-5Si under the low oxygen pressure. Their scaling behavior has been interpreted using the kinetic diagrams of the Fe-Cr-Si system, predicted by calculating the critical concentrations of silicon and chromium needed to avoid their single or coupled internal oxidation on the basis of an extension of a criterion originally proposed by Wagner. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：579 / 588
页数：10
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