High temperature corrosion behavior of iron aluminides containing ternary additions in H2/H2S/H2O mixed gases

被引：21

作者：

Kai, W ^{[1
]}

Chu, JP ^{[1
]}

Huang, RT ^{[1
]}

Lee, PY ^{[1
]}

机构：

[1] Natl Taiwan Ocean Univ, Inst Mat Engn, Keelung 20224, Taiwan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 240卷

关键词：

high-temperature corrosion; iron aluminides; Cr; Mn; Mo;

D O I：

10.1016/S0921-5093(97)00676-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The high-temperature corrosion behavior of four iron aluminides containing Fe-18Al (in at.%) and three Fe-18Al-5M alloys (where M was Cr, Mn, or Mo) was studied over the temperature range of 700-900 degrees C in a H-2/H2S/H2O atmosphere. The corrosion kinetics followed the parabolic rate law in all cases, regardless of temperature and alloy composition. The parabolic rate constants decreased with decreasing temperature, and the addition of ternary elements resulted in various decreases in the corrosion rate compared with Fe-18Al. It was found that Mo was effective to improve the corrosion resistance at T equal to or less than 800 degrees C while Cr had a better improvement at 900 degrees C. The scales formed on all iron aluminides were strongly dependent on temperature and ternary addition. (C) 1997 Elsevier Science S.A.

引用

页码：859 / 870

页数：12

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