Hot corrosion of SiO2-Ta2O5 binary scale on MoSi2-based ceramics

Le Sun; Qian Gang Fu; Jia Sun

doi:10.1016/j.corsci.2021.109413

Hot corrosion of SiO₂-Ta₂O₅ binary scale on MoSi₂-based ceramics

Le Sun, Qian Gang Fu, Jia Sun

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

5 Scopus citations

Abstract

The SiO₂-Ta₂O₅ binary scales with different Ta₂O₅ contents were prepared on MoSi₂-based ceramics by pre-oxidation. Hot corrosion with Na₂SO₄ was carried out at 1000 °C for 8 h. The pre-oxidized SiO₂-Ta₂O₅ scale on ceramics with 10 % Ta₂O₅ has an excellent hot corrosion resistance. Ta₂O₅ reacted preferentially with Na₂SO₄ forming solid sodium tantalates to retard the dissolution of SiO₂. A dense reaction layer can be formed to prevent the further infiltration of Na₂SO₄. Compared to the pure SiO₂ scale without Ta₂O₅, fewer Na₂MoO₄ and no obvious corrosion hole can be observed.

Original language	English
Article number	109413
Journal	Corrosion Science
Volume	185
DOIs	https://doi.org/10.1016/j.corsci.2021.109413
State	Published - Jun 2021

Keywords

Hot corrosion
MoSi
NaSO
Oxidation
TaO

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10.1016/j.corsci.2021.109413

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title = "Hot corrosion of SiO2-Ta2O5 binary scale on MoSi2-based ceramics",

abstract = "The SiO2-Ta2O5 binary scales with different Ta2O5 contents were prepared on MoSi2-based ceramics by pre-oxidation. Hot corrosion with Na2SO4 was carried out at 1000 °C for 8 h. The pre-oxidized SiO2-Ta2O5 scale on ceramics with 10 % Ta2O5 has an excellent hot corrosion resistance. Ta2O5 reacted preferentially with Na2SO4 forming solid sodium tantalates to retard the dissolution of SiO2. A dense reaction layer can be formed to prevent the further infiltration of Na2SO4. Compared to the pure SiO2 scale without Ta2O5, fewer Na2MoO4 and no obvious corrosion hole can be observed.",

keywords = "Hot corrosion, MoSi, NaSO, Oxidation, TaO",

author = "Le Sun and Fu, {Qian Gang} and Jia Sun",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = jun,

doi = "10.1016/j.corsci.2021.109413",

language = "英语",

volume = "185",

journal = "Corrosion Science",

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TY - JOUR

T1 - Hot corrosion of SiO2-Ta2O5 binary scale on MoSi2-based ceramics

AU - Sun, Le

AU - Fu, Qian Gang

AU - Sun, Jia

PY - 2021/6

Y1 - 2021/6

N2 - The SiO2-Ta2O5 binary scales with different Ta2O5 contents were prepared on MoSi2-based ceramics by pre-oxidation. Hot corrosion with Na2SO4 was carried out at 1000 °C for 8 h. The pre-oxidized SiO2-Ta2O5 scale on ceramics with 10 % Ta2O5 has an excellent hot corrosion resistance. Ta2O5 reacted preferentially with Na2SO4 forming solid sodium tantalates to retard the dissolution of SiO2. A dense reaction layer can be formed to prevent the further infiltration of Na2SO4. Compared to the pure SiO2 scale without Ta2O5, fewer Na2MoO4 and no obvious corrosion hole can be observed.

AB - The SiO2-Ta2O5 binary scales with different Ta2O5 contents were prepared on MoSi2-based ceramics by pre-oxidation. Hot corrosion with Na2SO4 was carried out at 1000 °C for 8 h. The pre-oxidized SiO2-Ta2O5 scale on ceramics with 10 % Ta2O5 has an excellent hot corrosion resistance. Ta2O5 reacted preferentially with Na2SO4 forming solid sodium tantalates to retard the dissolution of SiO2. A dense reaction layer can be formed to prevent the further infiltration of Na2SO4. Compared to the pure SiO2 scale without Ta2O5, fewer Na2MoO4 and no obvious corrosion hole can be observed.

KW - Hot corrosion

KW - MoSi

KW - NaSO

KW - Oxidation

KW - TaO

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U2 - 10.1016/j.corsci.2021.109413

DO - 10.1016/j.corsci.2021.109413

M3 - 文章

AN - SCOPUS:85103138756

SN - 0010-938X

VL - 185

JO - Corrosion Science

JF - Corrosion Science

M1 - 109413

ER -

Hot corrosion of SiO₂-Ta₂O₅ binary scale on MoSi₂-based ceramics

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Keywords

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