424 超臨界水環境におけるNi基合金の腐食(金属系材料)

概要

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Water of 648K and 22.1MPa or more is called super critical water, which has an excellent organic solvent characteristic. Recently, the application of supercritical water in various fields has been tried. However, metal corrodes in supercritical water environments, especially, reactive containers corrode remarkably from the hydrochloric acid caused in processing of PCB. Therefore, the corrosion of reactive containers and their longevity are serious problems. It is important to make a long-life reactive container. In this study, the corrosive behavior of a nickel based alloy was investigated in supercritical water at 573 to 773K and 20 to 60MPa for 24h. The result was that the corrosion rate was unaffected as the examination temperature increased in all materials. Moreover, the corrosion rate increased as the HCl concentration increased in all materials.
社団法人日本機械学会の論文
2006-11-25