Influence of pre-oxidation on the corrosion and mechanical strength of Fe-25Cr and Fe-25Cr-20Ni alloys at 973 K

被引：7
|
作者：
Sohn, Il Ryoung
Narita, Toshio
机构：
[1] POSCO Tech Res Labs, Jeonnam Gwangyang Si 545090, South Korea
[2] Hokkaido Univ, Grad Sch Engn, Res Grp Interface Control Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan
来源：
OXIDATION OF METALS | 2006年 / 65卷 / 3-4期
关键词：
pre-oxidation; Cr2O3; Fe-25Cr; Fe-25Cr-20Ni; strength; corrosion;
D O I：
10.1007/s11085-006-9011-4
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The influence of pre-oxidation on the corrosion and mechanical strength of Fe-25Cr and Fe-25Cr-20Ni alloys was investigated in N-2-0.1SO(2) at 973 K with and without mechanical loadings. About 0.1 mu m-thick Cr2O3 scales formed on the Fe-25Cr alloy by pre-oxidation in Ar. However, spinel oxides of (Fe,Cr)(3)O-4 remained on the Cr2O3 and voids formed at the oxide/metal interface on Fe-25Cr-20Ni after pre-oxidation in Ar. The preformed oxides are very effective in preventing corrosion of the alloy surfaces. The preformed oxides are also beneficial to increase the strength of the alloys in corrosive environments. The effects of pre-oxidation on Fe-25Cr are stronger than those of Fe-25Cr-20Ni due to the different characteristics of the preformed oxides.
引用
收藏
页码：181 / 194
页数：14
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