Electrochemical response of scratched Alloy 600 in simulated primary water and its influence with hydrogen entry
Electrochemical response of scratched Alloy 600 in simulated primary waterand its influence with hydrogen entry
著者:
Fanjiang Meng Zhanpeng Lu Tetsuo Shoji Jianqiu Wang En-Hou Han
発刊日:
公開日:
Anodic polarizationCathodic chargingEISSCC
概要
The effect of scratches on oxidation evolution of Alloy 600 was monitored by EIS in 290A°C simulated primary water. EIS result indicates that oxide film reached a stable condition until 7 days' immersion. The scratched Alloy 600 possessed almost the same evolution of oxide film with plain specimens. Anodic polarization was pe rformed to study combined effect of scratches and charged hydrogen. The anodic current changes of scratched A lloy 600 after hydrogen charging were not the simple superimposition between that of scratched and charged p lain Alloy 600. Alloy 600 after scratching was supposed to trap more hydrogen because of introduction of cold work. The trapped hydrogen could accelerate the oxidation by enhancing dissolution of chromium oxides. Thus, the oxides became less protective and anodic current increased considerably over more noble potential range.
