Effect of SO2 on corrosion behaviour of Ni-base alloys in a simulated combustion environment

被引：4

作者：

Xi, Xuteng ^{[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：

CORROSION SCIENCE | 2024年 / 234卷

基金：

澳大利亚研究理事会;

关键词：

Ni-based alloys; Hot corrosion; Alloying effect; SO2; HIGH-TEMPERATURE CORROSION; HOT CORROSION; CR ALLOYS; CO2; GAS; NICKEL; OXIDATION; CHROMIUM; ATMOSPHERES; PERFORMANCE; MECHANISMS;

D O I：

10.1016/j.corsci.2024.112151

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Alloys of Ni-25Cr-(2Mn-1Si) under deposits of sulphate or ash + sulphate were exposed to a wet CO2 2 gas with or without 0.5 vol% SO2 2 at 650 degrees C for 300 h. Without SO2, 2 , multi-layered reaction products formed. Under sulphate, they were external NiO, inner NiCr spinel + Cr2O3 2 O 3 band, internal oxidation zone and internal CrxS x S precipitates. Under ash + sulphate, they were external NiO + Ni above the internal oxidation zone. Introducing SO2 2 in the gas promoted alloy passivation, forming thin chromia scales under both deposits. Alloying with Mn and Si produced only minor improvements. These effects are examined in light of gas-deposit-alloy interactions.

引用

页数：13

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