The corrosion behavior of two new TiNbZrAl alloys together with the cp-Ti was investigated for dental applications. All samples were tested by electrochemical impedance spectroscopy (EIS) performed in artificial saliva with different pH (5.6 and 4.5), fluoride (2000 ppm F À ) and caffeine (1 mg/mL) contents. Additionally, scanning electron microscopy (SEM) was performed to observe the surface morphology after 1 day immersion in the test solution. The presence of 1 mg/mL caffeine in acidified fluoridated artificial saliva (pH 4.5) with 2000 ppm F À could prevent the cp-Ti and TiNbZrAl alloys from attack by fluoride ions.
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