The Effect of Fluoride Ion on the Anodic Behavior of Titanium in Sulfuric Acid

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Abstract
The anodic behavior of titanium in the presence of fluoride ion and sulfuric acid has been studied. Fluoride ion accelerates active corrosion and results in more active, time‐dependent corrosion potentials and greatly increased current requirements for passivation. The critical current density is found to be first order with respect to fluoride ion at low concentration and less than unity at higher fluoride levels. Corrosion in the passive region is also increased although to a lesser extent than in the active state.

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