Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 495, Issue -, Pages 154-163Publisher
ELSEVIER
DOI: 10.1016/j.jnucmat.2017.08.015
Keywords
Metals and alloys; Electrochemical impedance spectroscopy; Corrosion; Nuclear reactor materials
Funding
- DOE/NEUP [DOE/NEUP-IRP-15-9318]
- DOE/NEUP
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High entropy alloys are a new class of metallic materials with potential for use in a wide variety of applications including their use in corrosive environment. The present study focused on the corrosion behavior of a single-phase, face-centered cubic high entropy alloy (HEA) Al0.1CoCrFeNi in as-cast condition, and the results are compared with the corrosion behavior of the SS304. The microstructural characterization of the alloys in as-received condition was carried out using optical microscopy, electron backscattered diffraction, energy dispersive spectroscopy, and X-ray diffraction. Corrosion behavior was studied using potentiodynamic polarization test in a 3.5 wt% NaCl solution and electrochemical impedance spectroscopy at room temperature. It was observed that the general corrosion resistance of the HEA was better than that of SS304. Pitting potential of the HEA was found to be superior to that of the SS304. Corrosion pits size was slightly smaller in SS304 than that in the HEA. 3D imaging determined that the pit depths were of the same order in both cases. Overall, the HEA Al0.1CoCrFeNi demonstrated a better resistance to general and pitting corrosion. (C) 2017 Elsevier B.V. All rights reserved.
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