Advanced neutron absorber Ni-Cr-Mo-Gd alloys seawater corrosion mechanism and susceptibility study

Wei Tang; Jiheon Jun; Sun Yong Kwon; Oscar Martinez; Yi Feng Su; Reyixiati Repukaiti

doi:10.1016/j.mtcomm.2024.108759

Advanced neutron absorber Ni-Cr-Mo-Gd alloys seawater corrosion mechanism and susceptibility study

Wei Tang, Jiheon Jun, Sun Yong Kwon, Oscar Martinez, Yi Feng Su, Reyixiati Repukaiti

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

Abstract

Previous studies demonstrated the corrosion susceptibility of advanced neutron absorber (ANA) Ni-Cr-Mo-Gd in a seawater environment but remained inconclusive. In this paper, scanning electron microscopy was employed to identify the corrosion phase in Ni-Cr-Mo-Gd, and computational thermodynamic simulation was used to study phase corrosion potentials. Results showed that the Ni₅Gd second phase, distributed along FCC grain boundaries in Ni-Cr-Mo-Gd, has lower corrosion potential than the substrate. Furthermore, heat treatment and alloy chemistry adjustment would not ameliorate the ANA corrosion susceptibility. Isolating the Ni₅Gd from the corrosion medium through advanced manufacturing is a viable way to improve the ANA corrosion resistance.

Original language	English
Article number	108759
Journal	Materials Today Communications
Volume	39
DOIs	https://doi.org/10.1016/j.mtcomm.2024.108759
State	Published - Jun 2024

Funding

This manuscript has been authored by Battelle Energy Alliance, LLC under contract No. DE-AC05-00OR22725 and DE-AC07–05ID14517. This work was supported by the US Department of Energy Office of Nuclear Energy. The authors gratefully acknowledge Sarah Graham at ORNL for metallographic specimen preparation, along with other people at ORNL and INL for specimen preparation and testing, as well as, technical review by QQ Ren and Ying Yang at ORNL and valuable comments from Josh Jarrell at INL. This manuscript has been authored by UT-Battelle, LLC under Contract No. DEAC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doepublic-access-plan ).

Keywords

Corrosion
Neutron absorber
Ni-Cr-Mo-Gd alloy
Spent nuclear fuel canister
Thermodynamic simulation

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10.1016/j.mtcomm.2024.108759

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title = "Advanced neutron absorber Ni-Cr-Mo-Gd alloys seawater corrosion mechanism and susceptibility study",

abstract = "Previous studies demonstrated the corrosion susceptibility of advanced neutron absorber (ANA) Ni-Cr-Mo-Gd in a seawater environment but remained inconclusive. In this paper, scanning electron microscopy was employed to identify the corrosion phase in Ni-Cr-Mo-Gd, and computational thermodynamic simulation was used to study phase corrosion potentials. Results showed that the Ni5Gd second phase, distributed along FCC grain boundaries in Ni-Cr-Mo-Gd, has lower corrosion potential than the substrate. Furthermore, heat treatment and alloy chemistry adjustment would not ameliorate the ANA corrosion susceptibility. Isolating the Ni5Gd from the corrosion medium through advanced manufacturing is a viable way to improve the ANA corrosion resistance.",

keywords = "Corrosion, Neutron absorber, Ni-Cr-Mo-Gd alloy, Spent nuclear fuel canister, Thermodynamic simulation",

author = "Wei Tang and Jiheon Jun and Kwon, \{Sun Yong\} and Oscar Martinez and Su, \{Yi Feng\} and Reyixiati Repukaiti",

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

year = "2024",

month = jun,

doi = "10.1016/j.mtcomm.2024.108759",

language = "English",

volume = "39",

journal = "Materials Today Communications",

issn = "2352-4928",

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TY - JOUR

T1 - Advanced neutron absorber Ni-Cr-Mo-Gd alloys seawater corrosion mechanism and susceptibility study

AU - Tang, Wei

AU - Jun, Jiheon

AU - Kwon, Sun Yong

AU - Martinez, Oscar

AU - Su, Yi Feng

AU - Repukaiti, Reyixiati

PY - 2024/6

Y1 - 2024/6

N2 - Previous studies demonstrated the corrosion susceptibility of advanced neutron absorber (ANA) Ni-Cr-Mo-Gd in a seawater environment but remained inconclusive. In this paper, scanning electron microscopy was employed to identify the corrosion phase in Ni-Cr-Mo-Gd, and computational thermodynamic simulation was used to study phase corrosion potentials. Results showed that the Ni5Gd second phase, distributed along FCC grain boundaries in Ni-Cr-Mo-Gd, has lower corrosion potential than the substrate. Furthermore, heat treatment and alloy chemistry adjustment would not ameliorate the ANA corrosion susceptibility. Isolating the Ni5Gd from the corrosion medium through advanced manufacturing is a viable way to improve the ANA corrosion resistance.

AB - Previous studies demonstrated the corrosion susceptibility of advanced neutron absorber (ANA) Ni-Cr-Mo-Gd in a seawater environment but remained inconclusive. In this paper, scanning electron microscopy was employed to identify the corrosion phase in Ni-Cr-Mo-Gd, and computational thermodynamic simulation was used to study phase corrosion potentials. Results showed that the Ni5Gd second phase, distributed along FCC grain boundaries in Ni-Cr-Mo-Gd, has lower corrosion potential than the substrate. Furthermore, heat treatment and alloy chemistry adjustment would not ameliorate the ANA corrosion susceptibility. Isolating the Ni5Gd from the corrosion medium through advanced manufacturing is a viable way to improve the ANA corrosion resistance.

KW - Corrosion

KW - Neutron absorber

KW - Ni-Cr-Mo-Gd alloy

KW - Spent nuclear fuel canister

KW - Thermodynamic simulation

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DO - 10.1016/j.mtcomm.2024.108759

M3 - Article

AN - SCOPUS:85189358164

SN - 2352-4928

VL - 39

JO - Materials Today Communications

JF - Materials Today Communications

M1 - 108759

ER -

Advanced neutron absorber Ni-Cr-Mo-Gd alloys seawater corrosion mechanism and susceptibility study

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