Synergistic effect of multiple molten salts on hot corrosion behaviour of Ni-based single crystal superalloy

Y. Q. Yang; Y. C. Zhao; Z. X. Wen; G. X. Lu; H. Q. Pei; Z. F. Yue

doi:10.1016/j.corsci.2022.110381

Synergistic effect of multiple molten salts on hot corrosion behaviour of Ni-based single crystal superalloy

Y. Q. Yang, Y. C. Zhao, Z. X. Wen, G. X. Lu, H. Q. Pei, Z. F. Yue

School of Mechanics,Civil Engineering and Architecture

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

31 Scopus citations

Abstract

Hot corrosion behaviour of Ni-base single crystal at 900 ℃ is investigated under three different mixed salts. The result shows that hot corrosion degree in Na₂SO₄ +NaCl+NaVO₃ is the most serious, followed by Na₂SO₄ + NaVO₃, and Na₂SO₄ +NaCl is the least. The hot corrosion mechanism of superalloy in Na₂SO₄ +NaCl+NaVO₃ salts is proposed. More importantly, the interaction of Na₂SO₄, NaCl and NaVO₃ is a synergistic relationship in which Na₂SO₄ causes a basic corrosion attack, and NaCl with NaVO₃ strengthen this attack. Therefore, in hot corrosion protection, the type of corrosive salt should be reduced to avoid the synergistic effect caused by multiple salts.

Original language	English
Article number	110381
Journal	Corrosion Science
Volume	204
DOIs	https://doi.org/10.1016/j.corsci.2022.110381
State	Published - 1 Aug 2022

Keywords

Hot corrosion
Internal sulfuration
NaSO+NaCl+NaVO salts
Ni-base superalloy
Protective oxides

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10.1016/j.corsci.2022.110381

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title = "Synergistic effect of multiple molten salts on hot corrosion behaviour of Ni-based single crystal superalloy",

abstract = "Hot corrosion behaviour of Ni-base single crystal at 900 ℃ is investigated under three different mixed salts. The result shows that hot corrosion degree in Na2SO4 +NaCl+NaVO3 is the most serious, followed by Na2SO4 + NaVO3, and Na2SO4 +NaCl is the least. The hot corrosion mechanism of superalloy in Na2SO4 +NaCl+NaVO3 salts is proposed. More importantly, the interaction of Na2SO4, NaCl and NaVO3 is a synergistic relationship in which Na2SO4 causes a basic corrosion attack, and NaCl with NaVO3 strengthen this attack. Therefore, in hot corrosion protection, the type of corrosive salt should be reduced to avoid the synergistic effect caused by multiple salts.",

keywords = "Hot corrosion, Internal sulfuration, NaSO+NaCl+NaVO salts, Ni-base superalloy, Protective oxides",

author = "Yang, {Y. Q.} and Zhao, {Y. C.} and Wen, {Z. X.} and Lu, {G. X.} and Pei, {H. Q.} and Yue, {Z. F.}",

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year = "2022",

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day = "1",

doi = "10.1016/j.corsci.2022.110381",

language = "英语",

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journal = "Corrosion Science",

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TY - JOUR

T1 - Synergistic effect of multiple molten salts on hot corrosion behaviour of Ni-based single crystal superalloy

AU - Yang, Y. Q.

AU - Zhao, Y. C.

AU - Wen, Z. X.

AU - Lu, G. X.

AU - Pei, H. Q.

AU - Yue, Z. F.

PY - 2022/8/1

Y1 - 2022/8/1

N2 - Hot corrosion behaviour of Ni-base single crystal at 900 ℃ is investigated under three different mixed salts. The result shows that hot corrosion degree in Na2SO4 +NaCl+NaVO3 is the most serious, followed by Na2SO4 + NaVO3, and Na2SO4 +NaCl is the least. The hot corrosion mechanism of superalloy in Na2SO4 +NaCl+NaVO3 salts is proposed. More importantly, the interaction of Na2SO4, NaCl and NaVO3 is a synergistic relationship in which Na2SO4 causes a basic corrosion attack, and NaCl with NaVO3 strengthen this attack. Therefore, in hot corrosion protection, the type of corrosive salt should be reduced to avoid the synergistic effect caused by multiple salts.

AB - Hot corrosion behaviour of Ni-base single crystal at 900 ℃ is investigated under three different mixed salts. The result shows that hot corrosion degree in Na2SO4 +NaCl+NaVO3 is the most serious, followed by Na2SO4 + NaVO3, and Na2SO4 +NaCl is the least. The hot corrosion mechanism of superalloy in Na2SO4 +NaCl+NaVO3 salts is proposed. More importantly, the interaction of Na2SO4, NaCl and NaVO3 is a synergistic relationship in which Na2SO4 causes a basic corrosion attack, and NaCl with NaVO3 strengthen this attack. Therefore, in hot corrosion protection, the type of corrosive salt should be reduced to avoid the synergistic effect caused by multiple salts.

KW - Hot corrosion

KW - Internal sulfuration

KW - NaSO+NaCl+NaVO salts

KW - Ni-base superalloy

KW - Protective oxides

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U2 - 10.1016/j.corsci.2022.110381

DO - 10.1016/j.corsci.2022.110381

M3 - 文章

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SN - 0010-938X

VL - 204

JO - Corrosion Science

JF - Corrosion Science

M1 - 110381

ER -

Synergistic effect of multiple molten salts on hot corrosion behaviour of Ni-based single crystal superalloy

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Keywords

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