Clarification of Mechanism of Hydrogen Accelerated Oxidation and Development of Hydrogen Charging Technique in High Temperature and High Pressurized Water

氢气加速氧化机理的阐明及高温高压水中充氢技术的发展

• 批准号: 24656418
• 负责人: KOMAZAKI Shin-ichi
• 金额: $ 2.58万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656418/
• 关键词: 低炭素オーステナイト系ステンレス鋼; 酸化; 水素; 水素誘起加速酸化; 高温高圧水中; 酸化皮膜; 空孔濃度; スモールパンチ試験; 低炭素オーステナイト系ス テンレス鋼

The purpose of this study was the clarification of hydrogen accelerated oxidation (HAO) mechanism of low carbon austenitic stainless steel in simulated BWR environment and development of hydrogen charging technique in high temperature and high pressurized water. The experimental results have confirmed that by charging hydrogen into the steel, the Cr concentration decreases and the vacancy concentration increases in the inner layer oxide film. Additionally, the small punch test in the simulated BWR environment revealed that the stress corrosion cracking (SCC) was observed in the hydrogen charged steel and the oxidation of crack tip was accelerated. This result suggests that the initiation of SCC may be strongly influenced by the HAO.

本研究的目的是阐明低碳奥氏体不锈钢在模拟沸腾堆环境中的氢加速氧化机理，以及高温高压水中充氢技术的发展。实验结果表明，向钢中充氢后，内层氧化膜中的铬浓度降低，空位浓度增加。此外，模拟沸腾堆环境下的小冲孔试验表明，充氢钢中观察到应力腐蚀开裂(SCC)，加速了裂尖的氧化。这一结果表明，应力腐蚀开裂的发生可能受HOO的强烈影响。

项目成果

Influence of Hydrogen in Steel on Oxidation Behavior of Low Carbon Austenitic Stainless Steel in High Temperature Water

钢中氢对低碳奥氏体不锈钢在高温水中氧化行为的影响

• 发表时间: 2013
• 期刊: E-Journal of Advanced Maintenance
• 作者: M. Nakajima;S. Komazaki and T. Shoji
• 通讯作者: S. Komazaki and T. Shoji