Electrical Equivalent Circuit Model Prediction of High-Entropy Alloy Behavior in Aggressive Media
Author:
Cabrera-Peña Jose1, Brito-Garcia Santiago Jose2, Mirza-Rosca Julia Claudia23ORCID, Callico Gustavo M.1
Affiliation:
1. Institute for Applied Microelectronics (IUMA), University of Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, Spain 2. Mechanical Engineering Department, University of Las Palmas de Gran Canaria, 35001 Las Palmas de Gran Canaria, Spain 3. Materials Engineering and Welding Department, Transilvania University of Brasov, 500036 Brasov, Romania
Abstract
Due to the optimistic outcomes of the research on high-entropy alloys, new designs of these alloys are being encouraged. We studied the high-entropy CoCrFeMoNi alloy and the CoCrFeMoNi alloy doped with Zr. In order to choose the best electrical equivalent circuit for the prediction of the behavior of these high-entropy alloys at various potentials in artificial seawater, electrochemical impedance spectroscopy (EIS) measurements were conducted on samples with and without Zr-doped CoCrFeMoNi. At various potential levels, the impedance spectra were measured between −1.0 and +0.8 V vs. SCE. The study consists of a preliminary section with microstructure by metallography, open-circuit potential, and linear polarization curves by direct-current tests followed by visual analysis of the impedance spectra, and, finally, the selection of an equivalent electrical circuit model to fit the experimental data. By leveraging the advantages of EIS analysis, the information is essential for materials development, corrosion-mitigation strategies, and the successful implementation of these alloys in practical applications. It is important to note that selecting an equivalent circuit is often an iterative and subjective process, as it involves a balance between model complexity and the ability to accurately represent the system’s behavior.
Funder
Romanian National Authority for Scientific Research, CNDI–UEFISCDI Cabildo de Gran Canaria
Subject
General Materials Science,Metals and Alloys
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