Electrochemical Characteristics of a Biomedical Ti70Zr20Nb7.5Ta2.5 Refractory High Entropy Alloy in an Artificial Saliva Solution

High entropy alloys are a new type of multi-component material with improved mechanical properties that could be useful in medical implants. The corrosion behavior biomedical Ti70Zr20Nb7.5Ta2.5 alloy was examined and matched commercial Ti the traditional biomaterial Ti6Al4V artificial saliva. Moreover, impact different pH concentrations fluoride ions on also investigated. Ecorr decreases following order: > Ti. steady-state potential OCP indicates resistance same immersed saliva at low (pH 2.0) high ion concentration (2000 ppm) suffers from cracking exhibits lowest to compared sample without (0–1000 values (5.0 7.0). These data reveal if enhanced or falls, reduces. EIS show passive layer is made up duplex outer inner oxide alloy's fluoride-containing solutions has been significantly reduced. Additionally, demonstrate rises increasing immersion time ions. According X-ray photoelectron spectroscopy investigation, protective oxides include TiO2, ZrO2, Nb2O5, Ta2O5. can considered as promising suitable for usage among all materials tested this work.