TY - JOUR
T1 - Characterization of surface films that develop on pre-oxidized copper in anoxic simulated groundwater with sulphide
AU - Ratia-Hanby, V.
AU - Isotahdon, E.
AU - Yue, X.
AU - Malmberg, P.
AU - Leygraf, C.
AU - Pan, J.
AU - Huttunen-Saarivirta, E.
N1 - Funding Information:
The COCOS project has been funded by Nordic Nuclear Safety Research NKS, via contracts AFT/NKS-R(19-21)127 , and by two affiliated organizations: VTT Technical Research Centre of Finland Ltd and KTH Royal Institute of Technology in Sweden . The financial support is gratefully acknowledged. Additionally, the authors wish to thank the following colleagues that have helped in the lab work: Mr. Tuomo Kinnunen and Mrs. Taru Lehtikuusi (corrosion tests), Mr. Harri Joki (FT-IR measurements), and Mrs. Mervi Somervuori (SEM).
Publisher Copyright:
© 2023 The Authors
PY - 2023/11/5
Y1 - 2023/11/5
N2 - Surface films formed on pre-oxidized copper in anoxic simulated groundwater with sulphide were characterized by field emission gun scanning electron microscopy (FEG-SEM), Fourier transform infrared spectroscopy (FT-IR), open circuit potential (OCP) measurements, and via analysing the water chemistry and weight changes in the specimens. Additionally, films developed under identical conditions on pre-oxidized and ground copper specimens were characterized by glow discharge optical emission spectroscopy (GDOES). The results revealed that the sulphide content in the groundwater significantly influences the morphology, composition and thickness of the surface film. The build-up of Cu2S was evidenced at the sulphide contents of 32 mg/L and 320 mg/L. GDOES depth profiling revealed that sulphur and oxygen coexisted in the film all through its thickness, yet the surface was essentially rich in sulphur. The results from characterization are presented in detail in this paper and discussed from the perspective of capabilities of the used methods.
AB - Surface films formed on pre-oxidized copper in anoxic simulated groundwater with sulphide were characterized by field emission gun scanning electron microscopy (FEG-SEM), Fourier transform infrared spectroscopy (FT-IR), open circuit potential (OCP) measurements, and via analysing the water chemistry and weight changes in the specimens. Additionally, films developed under identical conditions on pre-oxidized and ground copper specimens were characterized by glow discharge optical emission spectroscopy (GDOES). The results revealed that the sulphide content in the groundwater significantly influences the morphology, composition and thickness of the surface film. The build-up of Cu2S was evidenced at the sulphide contents of 32 mg/L and 320 mg/L. GDOES depth profiling revealed that sulphur and oxygen coexisted in the film all through its thickness, yet the surface was essentially rich in sulphur. The results from characterization are presented in detail in this paper and discussed from the perspective of capabilities of the used methods.
UR - http://www.scopus.com/inward/record.url?scp=85167968531&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2023.132214
DO - 10.1016/j.colsurfa.2023.132214
M3 - Article
SN - 0927-7757
VL - 676
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - Part A
M1 - 132214
ER -