Corrosion Behavior of Al<sub>10</sub>Cr<sub>30</sub>Fe<sub>25</sub>Mn<sub>30</sub>Ti<sub>5</sub> High-Entropy Alloy: Microstructural, Electrochemical, and Surface Analysis
Ulises Martin,
Jacob Ress,
Pablo Pérez,
Paloma Adeva,
David M. Bastidas
Affiliations
Ulises Martin
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
Jacob Ress
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
Pablo Pérez
National Center for Metallurgical Research (CENIM, CSIC), Ave. Gregorio del Amo 8, 28040 Madrid, Spain
Paloma Adeva
National Center for Metallurgical Research (CENIM, CSIC), Ave. Gregorio del Amo 8, 28040 Madrid, Spain
David M. Bastidas
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
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.
