Abstract
In this study, the effects of electrolyte type and its respective concentration on the corrosion behavior and passive film properties of the Ti6Al4V alloy were investigated. To do so, potentiodynamic polarization test, chronoamperometry method, X-ray diffraction (XRD), Mott-Schottky analysis and point defect model (PDM) were employed. The results indicated that the alloy exhibits superior corrosion resistance in alkaline electrolytes compared to acidic solutions. Moreover, increasing the electrolyte concentration results in inferior corrosion properties in both acidic and basic solutions, which is in agreement with XRD results. According to the PDM, the formation of more intact passive layers can be attributed to lower diffusivity of point defects in the resulting anodic films.
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