Effects of Si and SO2 on Corrosion of Fe-20Cr and Fe-20Cr-20Ni Alloys in Reducing Waste Combustion Gases

被引：3

作者：

Nguyen, Thuan Dinh ^{[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：

HIGH TEMPERATURE CORROSION OF MATERIALS | 2023年 / 100卷 / 5-6期

基金：

澳大利亚研究理事会;

关键词：

Steels; Water vapour; High temperature corrosion; Chloride; Sulphidation; RAY PHOTOELECTRON-SPECTROSCOPY; FE-CR; OXIDATION RESISTANCE; CHROMIA SCALES; NI-30CR ALLOYS; WATER-VAPOR; SILICON; BEHAVIOR; SULFUR; NI-20CR;

D O I：

10.1007/s11085-023-10200-3

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Model alloys, Fe-20Cr and Fe-20Cr-20Ni (wt%) with and without 1% Si, were exposed to four different gas mixtures Ar-10H(2)O, Ar-10H(2)O-0.1HCl, Ar-10H(2)O-0.1HCl-10CO(2), Ar-10H(2)O-0.1HCl-10CO(2)-0.5SO(2) (vol.%) at 650 degrees C. The Fe-20Cr and Fe-20Cr-20Ni alloys underwent breakaway corrosion in Ar-10H(2)O-(0.1HCl)-(10CO(2)), forming Cr2O3 and Fe-rich oxide nodules. Silicon addition markedly increased corrosion resistance for both alloys by forming an additional SiO2 layer beneath the Cr2O3 scale. Addition of SO2 to Ar-10H(2)O-0.1HCl-10CO(2) significantly suppressed the formation of Fe-rich oxide nodules on Fe-20Cr. Corrosion in the SO2-bearing gas resulted in (Cr, Fe, S)-rich precipitates in all alloys. The effects of gas composition and Si alloying on corrosion of both alloys are discussed in terms of transport processes within the scales.

引用

页码：621 / 653

页数：33

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