Long-term corrosion resistance of new Ti–Ta–Zr alloy in simulated physiological fluids by electrochemical and surface analysis methods

•Native passive film (TiO2, Ta2O5, ZrO2) on Ti–15Ta–5Zr alloy surface has a thickness of 8.5nm.•Duplex oxide film formed by inner, compact and by outer porous layer was modelled by EIS.•Passive film thickened over time by new depositions from physiological solutions.•After 1500h in acid Ringer solution the brushite was detected by XPS.•In neutral and alkaline Ringer solutions the hydroxyapatite was identified by XPS and SEM.