Corrosion of Fe-9Cr-(Mn, Si) alloys in CO2-H2O-SO2 gases

被引：36

作者：

Yu, Chun ^{[1
]}

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 | 2015年 / 98卷

基金：

澳大利亚研究理事会;

关键词：

Alloy; Oxidation; Carburization; Sulphidation; High temperature corrosion; HIGH-TEMPERATURE CORROSION; FE-CR ALLOYS; OXIDATION RESISTANCE; CARBON; CARBURIZATION; SILICON; SULFUR; IRON; ENVIRONMENTS; DIFFUSION;

D O I：

10.1016/j.corsci.2015.05.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Model alloys, Fe-9Cr, Fe-9Cr-2Mn and Fe-9Cr-0.5Si (wt%) were exposed to Ar-20%CO2-20%H2O-(0, 0.1, 0.5 and 1.0%)SO2 gases at 650 degrees C. In the absence of SO2, all alloys grew thick iron-rich oxide scales. Adding SO2 led to partial passivation by chromia formation on Fe-9Cr and Fe-9Cr-0.5Si, but not the Fe-9Cr-2Mn. Alloy carburisation was extensive in sulphur-free gas, but substantially suppressed by SO2. Internal sulphidation and oxidation were also observed. A silica layer formed beneath the chromia scale on Fe-9Cr-0.5Si in SO2-bearing gas, but not in sulphur-free gas. Reaction morphologies are discussed in terms of oxide grain boundary diffusion, as affected by sulphur uptake. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：516 / 529

页数：14

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