Effect of Temperature on Corrosion Behaviour of Fe-Cr Alloys in Wet CO2 With and Without HCl Gases

被引：5

作者：

Aye, Khaing Khaing ^{[1
]}

Cai, Yuchen ^{[1
]}

Zhang, Jianqiang ^{[1
]}

Young, David J. ^{[1
]}

机构：

[1] Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

来源：

OXIDATION OF METALS | 2022年 / 97卷 / 3-4期

基金：

澳大利亚研究理事会;

关键词：

Fe-Cr alloys; Temperature effect; Wet CO2; HCl; DIFFUSION-COEFFICIENT; INTERNAL OXIDATION; OXYGEN; EXFOLIATION; CHROMIUM; STEELS; IRON;

D O I：

10.1007/s11085-021-10092-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Corrosion behaviour of Fe-Cr (15, 20, 25, or 30 wt.%) alloys in wet CO2 without and with HCl (0.05 or 0.1 vol%) at 750 degrees C was investigated. The results are compared with those at 650 degrees C to reveal the temperature effect. In general, weight gain kinetics and oxide scaling rates decreased with the increased chromium levels. The effect of temperature on weight gains and oxide scaling was strongly dependent on N-Cr. For the 15 and 20 Cr alloys, rates increased with temperature in all conditions. However, for the 25 Cr alloy, the rate increased with temperature in HCl free gas, but decreased with temperature when HCl was present. The 30 Cr alloy experienced very small weight gains which slightly increased with T. Cross-section analysis revealed the formation of thick multi-layered oxides for Fe-15Cr and Fe-20Cr, a semi-protective duplex scale of Fe2O3 and Cr2O3 on Fe-25Cr, and a thin protective chromia scale for Fe-30Cr at both temperatures. Both oxide growth rate and oxide constitution were affected by temperature, N-Cr, and p(HCl). The correlation of these factors is discussed by considering interactions between the oxides and chlorine inside the different scale types.

引用

页码：371 / 400

页数：30

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