Abstract
The corrosion response of heat-treated Beta C titanium alloy in three distinct electrolytes at different temperatures was examined. All the recrystallized specimens with the random orientation of the grains showed similar corrosion behavior in fluoride-free electrolytes, whereas, in the case of fluoridated saliva a state transition occurred. Larger grain-sized specimens (900 ⁰C treated) with lower in-grain misorientation ensured higher corrosion resistance. XPS investigation confirmed that stable TiO2 passive film played a key role in preventing corrosion. Optimum combination of grain size and grain boundary energy developed for 900 ⁰C specimens is appropriate for usage in fluoride-treated dental works.
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