Combined Effects of pH and γ-Irradiation on the Corrosion of Co-Cr Alloy Stellite-6

The effects of γ-radiation on the corrosion of a cobalt-based alloy, Stellite-6, were studied at pH 6.0, 8.4 and 10.6 at room temperature. The type and thickness of the oxide formed and the dissolved cobalt content were analyzed following 3-d long corrosion tests using coupons in sealed vials. Oxidation kinetics were studied by monitoring the corrosion potential as a function of test conditions and by performing potentiostatic polarization tests...