Hot corrosion phenomena of Nb-Ti-Si based alloy and its silicide coating induced by different corrosive environments at 900 °C

Yanqiang Qiao; Jianping Kong; Xiping Guo

doi:10.1016/j.ceramint.2018.01.238

Hot corrosion phenomena of Nb-Ti-Si based alloy and its silicide coating induced by different corrosive environments at 900 °C

Yanqiang Qiao, Jianping Kong, Xiping Guo

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

34 Scopus citations

Abstract

This study aims to elucidate the hot corrosion behavior of Nb-Ti-Si based alloy and its silicide coating in different molten salts at 900 °C. The results show that both K₂SO₄ and Na₂SO₄ had detrimental effect on the corrosion performance of the alloy, but almost no effect on the coating. However, NaCl accelerated the corrosion process for both the alloy and coating, showing highest scale thickness and mass gain. The main corrosion products consist mainly of Na or K containing oxides, TiO₂ and amorphous silicate. The reactivity of the alloy and the coating in different corrosive environments is discussed.

Original language	English
Pages (from-to)	7978-7990
Number of pages	13
Journal	Ceramics International
Volume	44
Issue number	7
DOIs	https://doi.org/10.1016/j.ceramint.2018.01.238
State	Published - May 2018

Keywords

Hot corrosion
Intermetallic
Oxidation
Silicide coating

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10.1016/j.ceramint.2018.01.238

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title = "Hot corrosion phenomena of Nb-Ti-Si based alloy and its silicide coating induced by different corrosive environments at 900 °C",

abstract = "This study aims to elucidate the hot corrosion behavior of Nb-Ti-Si based alloy and its silicide coating in different molten salts at 900 °C. The results show that both K2SO4 and Na2SO4 had detrimental effect on the corrosion performance of the alloy, but almost no effect on the coating. However, NaCl accelerated the corrosion process for both the alloy and coating, showing highest scale thickness and mass gain. The main corrosion products consist mainly of Na or K containing oxides, TiO2 and amorphous silicate. The reactivity of the alloy and the coating in different corrosive environments is discussed.",

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AU - Qiao, Yanqiang

AU - Kong, Jianping

AU - Guo, Xiping

PY - 2018/5

Y1 - 2018/5

N2 - This study aims to elucidate the hot corrosion behavior of Nb-Ti-Si based alloy and its silicide coating in different molten salts at 900 °C. The results show that both K2SO4 and Na2SO4 had detrimental effect on the corrosion performance of the alloy, but almost no effect on the coating. However, NaCl accelerated the corrosion process for both the alloy and coating, showing highest scale thickness and mass gain. The main corrosion products consist mainly of Na or K containing oxides, TiO2 and amorphous silicate. The reactivity of the alloy and the coating in different corrosive environments is discussed.

AB - This study aims to elucidate the hot corrosion behavior of Nb-Ti-Si based alloy and its silicide coating in different molten salts at 900 °C. The results show that both K2SO4 and Na2SO4 had detrimental effect on the corrosion performance of the alloy, but almost no effect on the coating. However, NaCl accelerated the corrosion process for both the alloy and coating, showing highest scale thickness and mass gain. The main corrosion products consist mainly of Na or K containing oxides, TiO2 and amorphous silicate. The reactivity of the alloy and the coating in different corrosive environments is discussed.

KW - Hot corrosion

KW - Intermetallic

KW - Oxidation

KW - Silicide coating

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JO - Ceramics International

JF - Ceramics International

IS - 7

ER -

Hot corrosion phenomena of Nb-Ti-Si based alloy and its silicide coating induced by different corrosive environments at 900 °C

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Keywords

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