Corrosion Behavior of Hastelloy® C-2000® Ni-Cr-Mo-Fe Alloys in the Entrained-Flow Coal Gasification Syngas Plants

• Autorzy: Lee Sungkyu , Kim Min-Jung , Choi Nuri , Hwang Sang Yeon , Chung Seok-Woo , Lee Seung-Kong , Yun Yongseung

Identyfikatory

DOI

10.24425/amm.2020.132833

• Języki publikacji: EN

Abstrakty

EN

A mechanistic exposure experiment was performed on the commercially available and welded Ni-Cr-Mo-Fe alloy samples used in the piping materials of the coal gasification pilot plant. Thermodynamic Ellingham-Pourbaix stability diagrams were constructed to provide insight into the mechanism of the observed corrosion behavior. The thermodynamic inference on the corrosion mechanism was supplemented with the morphological, compositional and microstructural analyses of the exposed samples using scanning electron microscopy, X-ray diffraction and energy-dispersive X-ray spectroscopy analyses. X-ray diffraction result revealed stable corrosion products of NiO, MoNi4 and Cr_4.6 MoNi_2.1 after accumulated total exposure duration of 139 h to the corrosive atmosphere. Scanning electron microscopy and energy-dispersive X-ray spectroscopy positively identified formation of rather continuous and adherent pre-oxidation corrosion products although extensively peeled-off oxides were finally observed as corrosion scales on the post-exposure alloy samples, which were attributed to the chlorination/oxidation into thin (spalled) oxides.

Słowa kluczowe

EN

mixed oxidant corrosion; Hastelloy® C-2000® Ni-Cr-Mo-Fe alloy; coal gasification; high temperature halogencorrosion; hydrated chlorides

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2020
• Tom: Vol. 65, iss. 2
• Strony: 869--878
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Lee Sungkyu

• Department of Chemical Engineering, Dankook University, 152 Jukjeon-Ro, Suji-Gu, Yongin-Si, Gyeonggi-Do, 16890, South Korea

autor

Kim Min-Jung

• Sungkyunkwan University Advanced Materials Technology Research Center, Suwon-Si, 16419, Korea (South)

autor

Choi Nuri

• Hanyang University Department of Materials Science & Chemical Engineering, Ansan, 15588, Korea (South)

autor

Hwang Sang Yeon

• Institute for Advanced Engineering, Plant Engineering Division, Yongin-Si, 17180, Korea (South)

autor

Chung Seok-Woo

• Institute for Advanced Engineering, Plant Engineering Division, Yongin-Si, 17180, Korea (South)

autor

Lee Seung-Kong

• Institute for Advanced Engineering, Plant Engineering Division, Yongin-Si, 17180, Korea (South)

autor

Yun Yongseung

• Institute for Advanced Engineering, Plant Engineering Division, Yongin-Si, 17180, Korea (South)

Bibliografia

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Uwagi

EN

1. This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) affiliated to the Ministry of Trade, Industry and Energy (MOTIE) of the government of Republic of Korea (No. 20163010050080). J.H. Shin and Professor Joohyun Park (Hanyang University, Ansan, South Korea) are gratefully acknowledged for assistance. Also, many thanks are due to the Haynes International, Inc. (Kokomo, Indiana, US) for generous provision of Hastelloy® C-2000® Ni-Cr-Mo-Fe alloy samples in various forms. Last, but not least, thanks are due to reviewers for helpful comments and suggestions.

PL

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).