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Volume 12
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Article

Corrosion Behavior of Al10Cr30Fe25Mn30Ti5 High-Entropy Alloy: Microstructural, Electrochemical, and Surface Analysis

by
Ulises Martin
1,
Jacob Ress
1,
Pablo Pérez
2,
Paloma Adeva
2 and
David M. Bastidas
1,*
1
National Center for Education and Research on Corrosion and Materials Performance, NCERCAMP-UA, Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, 302 E Buchtel Ave, Akron, OH 44325-3906, USA
2
National Center for Metallurgical Research (CENIM, CSIC), Ave. Gregorio del Amo 8, 28040 Madrid, Spain
*
Author to whom correspondence should be addressed.
Metals 2022, 12(10), 1736; https://doi.org/10.3390/met12101736
Submission received: 15 September 2022 / Revised: 9 October 2022 / Accepted: 14 October 2022 / Published: 16 October 2022
(This article belongs to the Section Corrosion and Protection)
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Abstract

In this work, the corrosion performance of a new developed high-entropy alloy (HEA) of the composition Al10Cr30Fe25Mn30Ti5 (at. %) was studied. The corrosion testing of the Al10Cr30Fe25Mn30Ti5 HEA was carried out in 2.5 M NaOH, 0.6 M NaCl, and in 0.5 M H2SO4. The correlation between the microstructure, elemental composition, density, hardness, and corrosion resistance of the new developed Al10Cr30Fe25Mn30Ti5 HEA was investigated. The impedance response showed protective corrosion behavior for the neutral and acidic pH, while the alkaline environment led to a passivity breakdown due to dissolution of Al forming Al(OH)3. The outcome of the presented study suggests that new developed HEA is suitable to be used in industrial environments with a neutral and acidic pH.
Keywords: high-entropy alloys (HEA); electrochemical impedance spectroscopy (EIS); X-ray photoelectron spectroscopy (XPS); high-energy X-ray diffraction (HEXRD); passive film high-entropy alloys (HEA); electrochemical impedance spectroscopy (EIS); X-ray photoelectron spectroscopy (XPS); high-energy X-ray diffraction (HEXRD); passive film

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MDPI and ACS Style

Martin, U.; Ress, J.; Pérez, P.; Adeva, P.; Bastidas, D.M. Corrosion Behavior of Al10Cr30Fe25Mn30Ti5 High-Entropy Alloy: Microstructural, Electrochemical, and Surface Analysis. Metals 2022, 12, 1736. https://doi.org/10.3390/met12101736

AMA Style

Martin U, Ress J, Pérez P, Adeva P, Bastidas DM. Corrosion Behavior of Al10Cr30Fe25Mn30Ti5 High-Entropy Alloy: Microstructural, Electrochemical, and Surface Analysis. Metals. 2022; 12(10):1736. https://doi.org/10.3390/met12101736

Chicago/Turabian Style

Martin, Ulises, Jacob Ress, Pablo Pérez, Paloma Adeva, and David M. Bastidas. 2022. "Corrosion Behavior of Al10Cr30Fe25Mn30Ti5 High-Entropy Alloy: Microstructural, Electrochemical, and Surface Analysis" Metals 12, no. 10: 1736. https://doi.org/10.3390/met12101736

APA Style

Martin, U., Ress, J., Pérez, P., Adeva, P., & Bastidas, D. M. (2022). Corrosion Behavior of Al10Cr30Fe25Mn30Ti5 High-Entropy Alloy: Microstructural, Electrochemical, and Surface Analysis. Metals, 12(10), 1736. https://doi.org/10.3390/met12101736

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