Thermal and Mechanical Effects on the Corrosion Behavior of Ti-6Al-4V Alloy

Anodic and cathodic polarization behavior of Ti‐6Al‐4V alloy were determined by potentiostatic and galvanostatic techniques in deaerated 1, 5, and 10 N sulfuric acid solutions. In the active region, metallurgical processing, which included cold rolling and thermal treatment, had no effect on the corrosion behavior. It is suggested that a titanium hydride film exists on the titanium alloy surface. In the passive region, plastic deformation, due to cold rolling, did increase the passive current density; whereas crystallographic texturing, did not have an effect. The introduction of an α'‐phase due to thermal treatment produced an additional peak in the passive region.