Abstract
Abstract Effects of environmental factors on localized corrosion of copper (Cu)-based materials that are candidates for use in high-level nuclear waste containers were examined. Effects of bicarbonate (HCO3−), chloride (Cl−), and sulfate (SO42−), which are present in the ground water near the proposed Yucca Mountain site for a high-level waste repository, were studied. Localized corrosion was observed only at low temperatures in environments involving combinations of high HCO3− with high Cl− or high SO42−. Uniform corrosion was observed at low concentrations of HCO3− ( 80°C, irrespective of the Cl− and SO42− concentrations. Localized corrosion observed in the Cu-based alloys was much shallower than in stainless steels and nickel (Ni)-based alloys and tended to broaden with time under potentiostatic conditions. Oxygen-free Cu (CDA-102...
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