The effect of plastic deformation upon the titanium and Ti-1Ni-0.5Mo ternary alloy in 10% oxalic acid corrosion resistance

The influence of the plastic deformation degree on the corrosion resistance of the ternary Ti-1Ni-0.5Mo alloy in acid oxalic 10% at 25 degrees, 50 deg rees, 75 degreesC, in comparison with the base metal is presented. The pote ntiostatic and linear polarization techniques and the evolution of the corr osion potential with the time, point out the fact that, this allow is metas table in the corrosion media. This metastable slate is reflected in tile sh ape of the anodic polarization curves which present cathodic current peaks on the anodic branch of the curves. These characteristics of the behaviour are explained admiting an;I,,odic partial fixed curve and cathodic partial curves with variable slopes which depend on the plastic deformation degree of the alloy. The corrosion rates increase with the increasing plastic defo rmation degree and the alloy, as well as the titanium are, "relative stable ".