Effect of CrCl2 or VCl2 addition on corrosion of Cr metal in molten MgCl2-KCl

Yuxiang Peng; Kaustubh K. Bawane; Ellie Kim; Phillip Halstenberg; Bobby Layne; Sheng Dai; Kotaro Sasaki

doi:10.1016/j.corsci.2024.112423

Effect of CrCl₂ or VCl₂ addition on corrosion of Cr metal in molten MgCl₂-KCl

Yuxiang Peng
, Kaustubh K. Bawane
, Ellie Kim
, Phillip Halstenberg
, Bobby Layne
, Sheng Dai
, Kotaro Sasaki

Nuclear Materials Performance

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

2 Scopus citations

Abstract

This study investigated the effects of adding 1 wt% CrCl₂ and VCl₂ on Cr corrosion in eutectic MgCl₂-KCl at 773 K under an argon atmosphere, using electrochemistry and immersion experiments. The redox potential of V³⁺/V²⁺ was more negative than Cr²⁺/Cr, suggesting that V²⁺ can protect Cr from dissolution. Additionally, the morphological and chemical evolutions investigated with scanning transmission electron microscopy (STEM), energy-dispersive X-ray spectroscopy (EDS), and electron energy loss spectroscopy (EELS) confirmed the corrosion protection mechanism of adding CrCl₂ and VCl₂. These findings are crucial for further improving the stability of containment alloys in molten salt applications.

Original language	English
Article number	112423
Journal	Corrosion Science
Volume	239
Early online date	Aug 31 2024
DOIs	https://doi.org/10.1016/j.corsci.2024.112423
State	Published - Oct 2024

Keywords

Additives
Chromium
Corrosion protection
Electrochemistry
MgCl-KCl
STEM

INL Publication Number

INL/JOU-24-78642
177849

Access to Document

10.1016/j.corsci.2024.112423

Cite this

@article{2d2fcdc8f78546c8bb5c94f0e38a438b,

title = "Effect of CrCl2 or VCl2 addition on corrosion of Cr metal in molten MgCl2-KCl",

abstract = "This study investigated the effects of adding 1 wt\% CrCl2 and VCl2 on Cr corrosion in eutectic MgCl2-KCl at 773 K under an argon atmosphere, using electrochemistry and immersion experiments. The redox potential of V3+/V2+ was more negative than Cr2+/Cr, suggesting that V2+ can protect Cr from dissolution. Additionally, the morphological and chemical evolutions investigated with scanning transmission electron microscopy (STEM), energy-dispersive X-ray spectroscopy (EDS), and electron energy loss spectroscopy (EELS) confirmed the corrosion protection mechanism of adding CrCl2 and VCl2. These findings are crucial for further improving the stability of containment alloys in molten salt applications.",

keywords = "Additives, Chromium, Corrosion protection, Electrochemistry, MgCl-KCl, STEM",

author = "Yuxiang Peng and Bawane, \{Kaustubh K.\} and Ellie Kim and Phillip Halstenberg and Bobby Layne and Sheng Dai and Kotaro Sasaki",

note = "Publisher Copyright: {\textcopyright} 2024",

year = "2024",

month = oct,

doi = "10.1016/j.corsci.2024.112423",

language = "English",

volume = "239",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Effect of CrCl2 or VCl2 addition on corrosion of Cr metal in molten MgCl2-KCl

AU - Peng, Yuxiang

AU - Bawane, Kaustubh K.

AU - Kim, Ellie

AU - Halstenberg, Phillip

AU - Layne, Bobby

AU - Dai, Sheng

AU - Sasaki, Kotaro

PY - 2024/10

Y1 - 2024/10

N2 - This study investigated the effects of adding 1 wt% CrCl2 and VCl2 on Cr corrosion in eutectic MgCl2-KCl at 773 K under an argon atmosphere, using electrochemistry and immersion experiments. The redox potential of V3+/V2+ was more negative than Cr2+/Cr, suggesting that V2+ can protect Cr from dissolution. Additionally, the morphological and chemical evolutions investigated with scanning transmission electron microscopy (STEM), energy-dispersive X-ray spectroscopy (EDS), and electron energy loss spectroscopy (EELS) confirmed the corrosion protection mechanism of adding CrCl2 and VCl2. These findings are crucial for further improving the stability of containment alloys in molten salt applications.

AB - This study investigated the effects of adding 1 wt% CrCl2 and VCl2 on Cr corrosion in eutectic MgCl2-KCl at 773 K under an argon atmosphere, using electrochemistry and immersion experiments. The redox potential of V3+/V2+ was more negative than Cr2+/Cr, suggesting that V2+ can protect Cr from dissolution. Additionally, the morphological and chemical evolutions investigated with scanning transmission electron microscopy (STEM), energy-dispersive X-ray spectroscopy (EDS), and electron energy loss spectroscopy (EELS) confirmed the corrosion protection mechanism of adding CrCl2 and VCl2. These findings are crucial for further improving the stability of containment alloys in molten salt applications.

KW - Additives

KW - Chromium

KW - Corrosion protection

KW - Electrochemistry

KW - MgCl-KCl

KW - STEM

UR - https://www.scopus.com/pages/publications/85202802535

U2 - 10.1016/j.corsci.2024.112423

DO - 10.1016/j.corsci.2024.112423

M3 - Article

AN - SCOPUS:85202802535

SN - 0010-938X

VL - 239

JO - Corrosion Science

JF - Corrosion Science

M1 - 112423

ER -