Abstract
Abstract Corrosion tests were conducted to select the structural material for a reactor to decompose organic wastes generated from nuclear power plants, utilizing the supercritical water oxidation (SCWO) process. Test conditions were based on the decomposition of chloroprene (C4H5Cl) and cation exchange resin, which generate hydrochloric acid (HCl) and sulfuric acid (H2SO4) in process fluids. In order to select candidate materials, short-period screening tests were carried out on various corrosion-resistant materials in HCl and H2SO4 solutions, using static test vessels at 300°C, 400°C, and 450°C. Subsequently, cyclic corrosion tests were carried out for Ta, Ti, and Ti alloys to estimate the corrosion rate and to evaluate their applicability for waste-processing plants. The results of these tests indicate that the corrosion resistance of Ti alloys is sufficient for them to be applied as reactor materials for organic waste decomposition systems using the SCWO process. In this paper, the stability of surf a...
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