Effect of sulfuric acid concentration on corrosion behavior of Al0.1CoCrFeNi high-entropy alloy

Sun, Y. and Lan, A. and Wang, Z. and Zhang, M. and Qiao, J. (2022) Effect of sulfuric acid concentration on corrosion behavior of Al0.1CoCrFeNi high-entropy alloy. Journal of physics and chemistry of solids, 161. ISSN 0022-3697

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Abstract

The influence of H2SO4 solution concentration on the corrosion behavior of as-cast Al0.1CoCrFeNi high-entropy alloys (HEAs) is investigated. The potentiodynamic polarization curves of the Al0.1CoCrFeNi HEA exhibit excellent corrosion resistance and a wide passive region (ΔE > 1150 mV) in acid solutions. The samples show a spontaneous passivation behavior in low-concentration (0.1, 0.2 and 0.3 M) and two anodic active–passive peaks in high-concentration (0.5 and 1.0 M) H2SO4 solutions. The morphology investigation by scanning electron microscopy suggests that selective corrosion is initiated from the inter-dendrite regions. The X-ray photoelectron spectroscopy results demonstrate that the observed passive behavior variation is associated with chemical composition change of the passive films.

Item Type:
Journal Article
Journal or Publication Title:
Journal of physics and chemistry of solids
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
170516
Deposited By:
Deposited On:
18 May 2022 14:00
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Nov 2022 10:45