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Revealing the corrosion mechanism of an Al0.1CoCrFeNi high entropy alloy in high temperature carbon dioxide environment

Journal Article · · Corrosion Science
 [1];  [2];  [1];  [3];  [1];  [2];  [4];  [5];  [2]
  1. East China University of Technology, Nanchang (China); Shanghai Jiao Tong Univ. (China)
  2. Shanghai Jiao Tong Univ. (China)
  3. East China University of Technology, Nanchang (China)
  4. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  5. Nuclear Power Institute of China, Chengdu (China)
The corrosion behavior of an Al0.1CoCrFeNi HEA in high temperature CO2 at 850 °C for different exposure periods was investigated using different characterization methods. Further, weight gain increased with extended exposure periods, yet it remained lower than most conventional alloys. A double-layer oxide film consisting of Cr2O3 and Al2O3 formed after 100 and 500 h of exposure, while a single layer of Cr2O3 developed after 1000 h of exposure. CoCrFeNi particles with an FCC structure were embedded in the oxide films irrespective of the exposure periods. Moreover, a transition zone containing numerous striped-like Al2O3 oxides along the grain boundaries was developed underneath the oxide films.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
Jiangxi Provincial Natural Science; National Natural Science Foundation of China (NSFC); USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2438512
Report Number(s):
LA-UR--24-25768
Journal Information:
Corrosion Science, Journal Name: Corrosion Science Vol. 239; ISSN 0010-938X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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