Grain Size Effect on Corrosion Behavior of Inconel 625 Film Against Molten MgCl2-NaCl-KCl Salt

Jinghua Feng; Li Mao; Guangcui Yuan; Youyang Zhao; Judith Vidal; Li Liu

doi:10.1016/j.corsci.2022.110097

Grain Size Effect on Corrosion Behavior of Inconel 625 Film Against Molten MgCl2-NaCl-KCl Salt

Jinghua Feng, Li Mao, Guangcui Yuan, Youyang Zhao, Judith Vidal, Li Liu

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

12 Scopus Citations

Abstract

This study evaluated the grain size effect of Inconel 625 film against molten chloride salt. It is found that larger grain size Inconel 625 exhibits better corrosion resistance by reducing Cr depletion. ~ 2 nm surface NiO layer of Inconel 625 is incapable of compensating the negative effects from more initiation corrosion sites. Mo is the least likely leached element and its enrichment occurs in Cr-depleted regions as a result of Mo diffusion. Mg and Cl are two most seen salt elements in all corroded samples, while K and Na only attack Inconel 625 with the smallest grain size.

Original language	American English
Article number	110097
Number of pages	9
Journal	Corrosion Science
Volume	197
DOIs	https://doi.org/10.1016/j.corsci.2022.110097 https://doi.org/10.1016/j.corsci.2022.110097
State	Published - 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd

NREL Publication Number

NREL/JA-5500-82002

Keywords

Corrosion
Grain
Molten salt
Ni-based alloy
Oxide

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title = "Grain Size Effect on Corrosion Behavior of Inconel 625 Film Against Molten MgCl2-NaCl-KCl Salt",

abstract = "This study evaluated the grain size effect of Inconel 625 film against molten chloride salt. It is found that larger grain size Inconel 625 exhibits better corrosion resistance by reducing Cr depletion. ~ 2 nm surface NiO layer of Inconel 625 is incapable of compensating the negative effects from more initiation corrosion sites. Mo is the least likely leached element and its enrichment occurs in Cr-depleted regions as a result of Mo diffusion. Mg and Cl are two most seen salt elements in all corroded samples, while K and Na only attack Inconel 625 with the smallest grain size.",

keywords = "Corrosion, Grain, Molten salt, Ni-based alloy, Oxide",

author = "Jinghua Feng and Li Mao and Guangcui Yuan and Youyang Zhao and Judith Vidal and Li Liu",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

doi = "10.1016/j.corsci.2022.110097",

language = "American English",

volume = "197",

journal = "Corrosion Science",

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TY - JOUR

T1 - Grain Size Effect on Corrosion Behavior of Inconel 625 Film Against Molten MgCl2-NaCl-KCl Salt

AU - Feng, Jinghua

AU - Mao, Li

AU - Yuan, Guangcui

AU - Zhao, Youyang

AU - Vidal, Judith

AU - Liu, Li

PY - 2022

Y1 - 2022

N2 - This study evaluated the grain size effect of Inconel 625 film against molten chloride salt. It is found that larger grain size Inconel 625 exhibits better corrosion resistance by reducing Cr depletion. ~ 2 nm surface NiO layer of Inconel 625 is incapable of compensating the negative effects from more initiation corrosion sites. Mo is the least likely leached element and its enrichment occurs in Cr-depleted regions as a result of Mo diffusion. Mg and Cl are two most seen salt elements in all corroded samples, while K and Na only attack Inconel 625 with the smallest grain size.

AB - This study evaluated the grain size effect of Inconel 625 film against molten chloride salt. It is found that larger grain size Inconel 625 exhibits better corrosion resistance by reducing Cr depletion. ~ 2 nm surface NiO layer of Inconel 625 is incapable of compensating the negative effects from more initiation corrosion sites. Mo is the least likely leached element and its enrichment occurs in Cr-depleted regions as a result of Mo diffusion. Mg and Cl are two most seen salt elements in all corroded samples, while K and Na only attack Inconel 625 with the smallest grain size.

KW - Corrosion

KW - Grain

KW - Molten salt

KW - Ni-based alloy

KW - Oxide

UR - http://www.scopus.com/inward/record.url?scp=85122613845&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2022.110097

DO - 10.1016/j.corsci.2022.110097

M3 - Article

AN - SCOPUS:85122613845

SN - 0010-938X

VL - 197

JO - Corrosion Science

JF - Corrosion Science

M1 - 110097

ER -

Grain Size Effect on Corrosion Behavior of Inconel 625 Film Against Molten MgCl2-NaCl-KCl Salt

Abstract

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NREL Publication Number

Keywords

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