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
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
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
UR - http://www.scopus.com/inward/record.url?scp=85189358164&partnerID=8YFLogxK
U2 - 10.1016/j.mtcomm.2024.108759
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 -