Static water vapor corrosion behavior of MoSi2/Mullite composite coating on Nb based alloy at 1500 °C

Kaifei Fan; Jia Sun; Lingxiang Guo; Yuyu Zhang; Qiangang Fu

doi:10.1016/j.corsci.2022.110234

Static water vapor corrosion behavior of MoSi₂/Mullite composite coating on Nb based alloy at 1500 °C

Kaifei Fan, Jia Sun, Lingxiang Guo, Yuyu Zhang, Qiangang Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Water vapor corrosion behavior of MoSi₂/Mullite composite coating on Nb based alloy at 1500 °C were investigated compared with its static dry-oxygen oxidation behavior. The oxidation parabolic rate of samples in water vapor environment was − 0.39 mg/(cm² h^1/2), ~ 4 times higher than that in dry oxygen. Water vapor accelerated the penetration of O₂ and resulted in second Mo (sp) and MoO₂ (s), causing stronger volatilization of gaseous species out of the aluminosilicate scale than that in dry oxygen. Moreover, the crystallization of SiO₂ in the scale was inhibited which accelerated the corrosion degradation of coating in water vapor environment at 1500 °C.

Original language	English
Article number	110234
Journal	Corrosion Science
Volume	200
DOIs	https://doi.org/10.1016/j.corsci.2022.110234
State	Published - 15 May 2022

Keywords

High temperature oxidation
MoSi
Mullite
Nb based alloy
Water vapor corrosion

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10.1016/j.corsci.2022.110234

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title = "Static water vapor corrosion behavior of MoSi2/Mullite composite coating on Nb based alloy at 1500 °C",

abstract = "Water vapor corrosion behavior of MoSi2/Mullite composite coating on Nb based alloy at 1500 °C were investigated compared with its static dry-oxygen oxidation behavior. The oxidation parabolic rate of samples in water vapor environment was − 0.39 mg/(cm2 h1/2), ~ 4 times higher than that in dry oxygen. Water vapor accelerated the penetration of O2 and resulted in second Mo (sp) and MoO2 (s), causing stronger volatilization of gaseous species out of the aluminosilicate scale than that in dry oxygen. Moreover, the crystallization of SiO2 in the scale was inhibited which accelerated the corrosion degradation of coating in water vapor environment at 1500 °C.",

keywords = "High temperature oxidation, MoSi, Mullite, Nb based alloy, Water vapor corrosion",

author = "Kaifei Fan and Jia Sun and Lingxiang Guo and Yuyu Zhang and Qiangang Fu",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

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doi = "10.1016/j.corsci.2022.110234",

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TY - JOUR

T1 - Static water vapor corrosion behavior of MoSi2/Mullite composite coating on Nb based alloy at 1500 °C

AU - Fan, Kaifei

AU - Sun, Jia

AU - Guo, Lingxiang

AU - Zhang, Yuyu

AU - Fu, Qiangang

PY - 2022/5/15

Y1 - 2022/5/15

N2 - Water vapor corrosion behavior of MoSi2/Mullite composite coating on Nb based alloy at 1500 °C were investigated compared with its static dry-oxygen oxidation behavior. The oxidation parabolic rate of samples in water vapor environment was − 0.39 mg/(cm2 h1/2), ~ 4 times higher than that in dry oxygen. Water vapor accelerated the penetration of O2 and resulted in second Mo (sp) and MoO2 (s), causing stronger volatilization of gaseous species out of the aluminosilicate scale than that in dry oxygen. Moreover, the crystallization of SiO2 in the scale was inhibited which accelerated the corrosion degradation of coating in water vapor environment at 1500 °C.

AB - Water vapor corrosion behavior of MoSi2/Mullite composite coating on Nb based alloy at 1500 °C were investigated compared with its static dry-oxygen oxidation behavior. The oxidation parabolic rate of samples in water vapor environment was − 0.39 mg/(cm2 h1/2), ~ 4 times higher than that in dry oxygen. Water vapor accelerated the penetration of O2 and resulted in second Mo (sp) and MoO2 (s), causing stronger volatilization of gaseous species out of the aluminosilicate scale than that in dry oxygen. Moreover, the crystallization of SiO2 in the scale was inhibited which accelerated the corrosion degradation of coating in water vapor environment at 1500 °C.

KW - High temperature oxidation

KW - MoSi

KW - Mullite

KW - Nb based alloy

KW - Water vapor corrosion

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U2 - 10.1016/j.corsci.2022.110234

DO - 10.1016/j.corsci.2022.110234

M3 - 文章

AN - SCOPUS:85126563279

SN - 0010-938X

VL - 200

JO - Corrosion Science

JF - Corrosion Science

M1 - 110234

ER -

Static water vapor corrosion behavior of MoSi₂/Mullite composite coating on Nb based alloy at 1500 °C

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