Effects of cerium and manganese on corrosion of Fe-Cr and Fe-Cr-Ni alloys in Ar-20CO2 gas at 818°C

被引：66
|
作者：
Thuan Dinh Nguyen [1 ]
Zhang, Jianqiang [1 ]
Young, David J. [1 ]
机构：
[1] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
来源：
CORROSION SCIENCE | 2013年 / 76卷
基金：
澳大利亚研究理事会;
关键词：
Alloy; Cerium; Manganese; High temperature corrosion; DIFFUSION-COEFFICIENT; INTERNAL OXIDATION; CARBURIZATION; CARBON; OXYGEN; OXIDE; IRON; AL; SI;
D O I：
10.1016/j.corsci.2013.06.046
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Model alloys Fe-9Cr, Fe-20Cr and Fe-20Cr-20Ni (wt.%) with Ce (0.05%, 0.1%) or Mn (1%, 2%) were exposed to Ar-200O(2) gas at 818 degrees C. Scales on Fe-9Cr alloys consisted of FeO and FeCr2O4, Fe-20Cr-(Ce) alloys formed only Cr2O3, and Fe-20Cr-(Mn) alloys formed Cr2O3 and MnCr2O4. All Fe-20Cr-20Ni alloys formed Fe3O4, FeCr2O4 and FeNi3. Cerium additions had little effects, but additions of 2% Mn significantly improved oxidation resistance of Fe-20Cr and Fe-20Cr-20Ni alloys. Most alloys also carburized. All alloys developed protective chromium-rich oxide scales in air. Different behavior in the two gases is attributed to faster Cr2O3 scaling rates induced by CO2. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：231 / 242
页数：12
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