Reaction Mechanism of Fe-Cr Alloy with O2-SO2-SO3 Reaction

Zheng Xiaoguang; Zhu Rizhang; Guo Manjiu

doi:10.13374/j.issn1001-053x.1990.02.028

Volume 12 Issue 2

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Zheng Xiaoguang, Zhu Rizhang, Guo Manjiu. Reaction Mechanism of Fe-Cr Alloy with O2-SO2-SO3 Reaction[J]. Chinese Journal of Engineering, 1990, 12(2): 148-153. doi: 10.13374/j.issn1001-053x.1990.02.028

Citation:

Zheng Xiaoguang, Zhu Rizhang, Guo Manjiu. Reaction Mechanism of Fe-Cr Alloy with O₂-SO₂-SO₃ Reaction[J]. Chinese Journal of Engineering, 1990, 12(2): 148-153. doi: 10.13374/j.issn1001-053x.1990.02.028

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Reaction Mechanism of Fe-Cr Alloy with O₂-SO₂-SO₃ Reaction

doi: 10.13374/j.issn1001-053x.1990.02.028

1. Dept. of Surface Sci. and Corro. Eng.;
2. Central Iron and Steel Research Institute, Beijing

Received Date: 1989-06-12
Available Online: 2021-11-15
Publish Date: 2021-11-15

Abstract

Abstract

Sulfidation-oxidation behaviors of Ni16Cr, Nil6Cr3Ti, Ni16Cr 2Nb alloys have been studied at 700℃ in O₂-10% (SO₂+SO₃). Corrosion products are observed and examined with X-ray diffraction and SEM. Under experimental condition, containing SO₃ corrosion rate of Ni16Cr alloy is rapider. Nb has little effect on degradation of alloy. When alloy containes Al or Ti, the oxidation rate of these alloys is slower. Products of corrosion consist of two layers; external layer (NiO + Ni₃S₂) mixture and internal layer sulfids and oxides containing all test alloying elements.
- corrosion,
- Ni-Cr alloy,
- reaction mechanism,
- oxygen-sulfido system