Abstract
Anodic polarization measurements have been made potentiostatically on single crystal and polycrystal titanium in 1N H2SO4 at 23 C (73 F). Three low index surfaces, (0001), (11<o>2</o>0), and (10<o>1</o>0) were studied together with polycrystalline rolled sheet material. A strong influence of crystallographic orientation on the anodic current densities was found in both the active and the passive regions. The most active surface was (11<o>2</o>0), the least active (0001). The most passive surface was also (0001), unless the specimen had been in a cathodic region, whereupon that orientation became the most reactive. That effect and others that are associated with titanium hydride formation are discussed. The effect on the reactivity of the polycrystalline surface due to preferred orientation texture is mentioned.
