Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C

Li Ping; Zhao Jie; Li Tingju; Pang Shengjiao

doi:doi:10.11648/j.am.20190803.14

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Hot Corrosion Behaviors of CoCrFeNiTi_0.5 High Entropy Alloy in the Mixture Salt of Na₂SO₄-25%K₂SO₄ and Na₂SO₄-25%NaCl at 750°C

Li Ping, Zhao Jie, Li Tingju, Pang Shengjiao

Published in Advances in Materials (Volume 8, Issue 3)

Received: 7 August 2019 Accepted: 28 August 2019 Published: 10 September 2019

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Abstract

Hot corrosion behaviors of CoCrFeNiTi_0.5 high entropy alloy pre-coated various mixture salt in air at 750°C were investigated respectively by using weight change kinetics, X-ray analyses, SEM equipped with EDS and EPMA. The results indicate that CoCrFeNiT_0.5 alloy exhibits relatively high corrosion resistance in Na₂SO₄-25%K₂SO₄ molten salts. The cross-section is divided into three parts: the oxide scale composed of various oxides, the corrosion affected zones with some micro-pores as well as minor of sulfides and the matrix. The addition of NaCl to Na₂SO₄ destroys seriously the integrity and compactness of the oxide scale and induces the formation of more micro-pores as well as sulfides in the corrosion affected zone, which accelerates the propagation of hot corrosion. As a result, the alloy suffers from more severe corrosion in Na₂SO₄-25% NaCl than in Na₂SO₄-25%K₂SO₄. Hot corrosion of the alloy in Na₂SO₄-25%K₂SO₄ is explained based on the oxidation and the basic fluxing of Cr₂O₃ in molten Na₂SO₄. However, hot corrosion process in Na₂SO₄-25% NaCl is dominated by the interaction of oxidation and chlorination. In addition, the internal sulfidation of Fe and Ni also contributes to hot corrosion of the alloy in both Na₂SO₄-25%K₂SO₄ and Na₂SO₄-25% NaCl mixture salt.

Published in	Advances in Materials (Volume 8, Issue 3)
DOI	10.11648/j.am.20190803.14
Page(s)	120-126
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

High Entropy Alloys (HEAs), Alkali Metal Sulfate, Low Melting Point Eutectic, Sulfidation, Chlorination

References

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APA Style

Li Ping, Zhao Jie, Li Tingju, Pang Shengjiao. (2019). Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C. Advances in Materials, 8(3), 120-126. https://doi.org/10.11648/j.am.20190803.14

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ACS Style

Li Ping; Zhao Jie; Li Tingju; Pang Shengjiao. Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C. Adv. Mater. 2019, 8(3), 120-126. doi: 10.11648/j.am.20190803.14

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AMA Style

Li Ping, Zhao Jie, Li Tingju, Pang Shengjiao. Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C. Adv Mater. 2019;8(3):120-126. doi: 10.11648/j.am.20190803.14

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@article{10.11648/j.am.20190803.14,
  author = {Li Ping and Zhao Jie and Li Tingju and Pang Shengjiao},
  title = {Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C},
  journal = {Advances in Materials},
  volume = {8},
  number = {3},
  pages = {120-126},
  doi = {10.11648/j.am.20190803.14},
  url = {https://doi.org/10.11648/j.am.20190803.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.am.20190803.14},
  abstract = {Hot corrosion behaviors of CoCrFeNiTi0.5 high entropy alloy pre-coated various mixture salt in air at 750°C were investigated respectively by using weight change kinetics, X-ray analyses, SEM equipped with EDS and EPMA. The results indicate that CoCrFeNiT0.5 alloy exhibits relatively high corrosion resistance in Na2SO4-25%K2SO4 molten salts. The cross-section is divided into three parts: the oxide scale composed of various oxides, the corrosion affected zones with some micro-pores as well as minor of sulfides and the matrix. The addition of NaCl to Na2SO4 destroys seriously the integrity and compactness of the oxide scale and induces the formation of more micro-pores as well as sulfides in the corrosion affected zone, which accelerates the propagation of hot corrosion. As a result, the alloy suffers from more severe corrosion in Na2SO4-25% NaCl than in Na2SO4-25%K2SO4. Hot corrosion of the alloy in Na2SO4-25%K2SO4 is explained based on the oxidation and the basic fluxing of Cr2O3 in molten Na2SO4. However, hot corrosion process in Na2SO4-25% NaCl is dominated by the interaction of oxidation and chlorination. In addition, the internal sulfidation of Fe and Ni also contributes to hot corrosion of the alloy in both Na2SO4-25%K2SO4 and Na2SO4-25% NaCl mixture salt.},
 year = {2019}
}

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TY  - JOUR
T1  - Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C
AU  - Li Ping
AU  - Zhao Jie
AU  - Li Tingju
AU  - Pang Shengjiao
Y1  - 2019/09/10
PY  - 2019
N1  - https://doi.org/10.11648/j.am.20190803.14
DO  - 10.11648/j.am.20190803.14
T2  - Advances in Materials
JF  - Advances in Materials
JO  - Advances in Materials
SP  - 120
EP  - 126
PB  - Science Publishing Group
SN  - 2327-252X
UR  - https://doi.org/10.11648/j.am.20190803.14
AB  - Hot corrosion behaviors of CoCrFeNiTi0.5 high entropy alloy pre-coated various mixture salt in air at 750°C were investigated respectively by using weight change kinetics, X-ray analyses, SEM equipped with EDS and EPMA. The results indicate that CoCrFeNiT0.5 alloy exhibits relatively high corrosion resistance in Na2SO4-25%K2SO4 molten salts. The cross-section is divided into three parts: the oxide scale composed of various oxides, the corrosion affected zones with some micro-pores as well as minor of sulfides and the matrix. The addition of NaCl to Na2SO4 destroys seriously the integrity and compactness of the oxide scale and induces the formation of more micro-pores as well as sulfides in the corrosion affected zone, which accelerates the propagation of hot corrosion. As a result, the alloy suffers from more severe corrosion in Na2SO4-25% NaCl than in Na2SO4-25%K2SO4. Hot corrosion of the alloy in Na2SO4-25%K2SO4 is explained based on the oxidation and the basic fluxing of Cr2O3 in molten Na2SO4. However, hot corrosion process in Na2SO4-25% NaCl is dominated by the interaction of oxidation and chlorination. In addition, the internal sulfidation of Fe and Ni also contributes to hot corrosion of the alloy in both Na2SO4-25%K2SO4 and Na2SO4-25% NaCl mixture salt.
VL  - 8
IS  - 3
ER  -

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Author Information

Li Ping

College of Materials Science and Engineering, Dalian University of Technology, Dalian, China
Zhao Jie

College of Materials Science and Engineering, Dalian University of Technology, Dalian, China
Li Tingju

College of Materials Science and Engineering, Dalian University of Technology, Dalian, China
Pang Shengjiao

College of Materials Science and Engineering, Dalian University of Technology, Dalian, China

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Li Ping, Zhao Jie, Li Tingju, Pang Shengjiao. (2019). Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C. Advances in Materials, 8(3), 120-126. https://doi.org/10.11648/j.am.20190803.14

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ACS Style

Li Ping; Zhao Jie; Li Tingju; Pang Shengjiao. Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C. Adv. Mater. 2019, 8(3), 120-126. doi: 10.11648/j.am.20190803.14

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AMA Style

Li Ping, Zhao Jie, Li Tingju, Pang Shengjiao. Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C. Adv Mater. 2019;8(3):120-126. doi: 10.11648/j.am.20190803.14

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@article{10.11648/j.am.20190803.14,
  author = {Li Ping and Zhao Jie and Li Tingju and Pang Shengjiao},
  title = {Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C},
  journal = {Advances in Materials},
  volume = {8},
  number = {3},
  pages = {120-126},
  doi = {10.11648/j.am.20190803.14},
  url = {https://doi.org/10.11648/j.am.20190803.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.am.20190803.14},
  abstract = {Hot corrosion behaviors of CoCrFeNiTi0.5 high entropy alloy pre-coated various mixture salt in air at 750°C were investigated respectively by using weight change kinetics, X-ray analyses, SEM equipped with EDS and EPMA. The results indicate that CoCrFeNiT0.5 alloy exhibits relatively high corrosion resistance in Na2SO4-25%K2SO4 molten salts. The cross-section is divided into three parts: the oxide scale composed of various oxides, the corrosion affected zones with some micro-pores as well as minor of sulfides and the matrix. The addition of NaCl to Na2SO4 destroys seriously the integrity and compactness of the oxide scale and induces the formation of more micro-pores as well as sulfides in the corrosion affected zone, which accelerates the propagation of hot corrosion. As a result, the alloy suffers from more severe corrosion in Na2SO4-25% NaCl than in Na2SO4-25%K2SO4. Hot corrosion of the alloy in Na2SO4-25%K2SO4 is explained based on the oxidation and the basic fluxing of Cr2O3 in molten Na2SO4. However, hot corrosion process in Na2SO4-25% NaCl is dominated by the interaction of oxidation and chlorination. In addition, the internal sulfidation of Fe and Ni also contributes to hot corrosion of the alloy in both Na2SO4-25%K2SO4 and Na2SO4-25% NaCl mixture salt.},
 year = {2019}
}

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TY  - JOUR
T1  - Hot Corrosion Behaviors of CoCrFeNiTi0.5 High Entropy Alloy in the Mixture Salt of Na2SO4-25%K2SO4 and Na2SO4-25%NaCl at 750°C
AU  - Li Ping
AU  - Zhao Jie
AU  - Li Tingju
AU  - Pang Shengjiao
Y1  - 2019/09/10
PY  - 2019
N1  - https://doi.org/10.11648/j.am.20190803.14
DO  - 10.11648/j.am.20190803.14
T2  - Advances in Materials
JF  - Advances in Materials
JO  - Advances in Materials
SP  - 120
EP  - 126
PB  - Science Publishing Group
SN  - 2327-252X
UR  - https://doi.org/10.11648/j.am.20190803.14
AB  - Hot corrosion behaviors of CoCrFeNiTi0.5 high entropy alloy pre-coated various mixture salt in air at 750°C were investigated respectively by using weight change kinetics, X-ray analyses, SEM equipped with EDS and EPMA. The results indicate that CoCrFeNiT0.5 alloy exhibits relatively high corrosion resistance in Na2SO4-25%K2SO4 molten salts. The cross-section is divided into three parts: the oxide scale composed of various oxides, the corrosion affected zones with some micro-pores as well as minor of sulfides and the matrix. The addition of NaCl to Na2SO4 destroys seriously the integrity and compactness of the oxide scale and induces the formation of more micro-pores as well as sulfides in the corrosion affected zone, which accelerates the propagation of hot corrosion. As a result, the alloy suffers from more severe corrosion in Na2SO4-25% NaCl than in Na2SO4-25%K2SO4. Hot corrosion of the alloy in Na2SO4-25%K2SO4 is explained based on the oxidation and the basic fluxing of Cr2O3 in molten Na2SO4. However, hot corrosion process in Na2SO4-25% NaCl is dominated by the interaction of oxidation and chlorination. In addition, the internal sulfidation of Fe and Ni also contributes to hot corrosion of the alloy in both Na2SO4-25%K2SO4 and Na2SO4-25% NaCl mixture salt.
VL  - 8
IS  - 3
ER  -

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