Study of Passive Films on Iron-base Alloy in High-Temperature-High -Pressure Aqueous Solution

高温高压水溶液中铁基合金钝化膜的研究

• 批准号: 60550496
• 负责人: SEO Masahiro
• 金额: $ 1.22万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550496/
• 关键词: Corrosion in high temperature water; Iron-base Alloy; 不働態皮膜

The corrosion behavior of Fe-26Cr alloy in a high-temperature-boric borate solution was electrochemically investigated in a autoclave and furthermore, the surface characterization of the alloy was performed with simultaneous use of Auger electron spectroscopy and argon-ion sputter-etching. The potential region in which chromium component of the alloy stabilizes the passive film narrows with increasing solution temperature (22゜C-250゜C). The surface enrichment of chromium component for the alloy specimen anodically oxidized for 90 min at 200゜C in the solution has a maximum at the potential of natural immersion and then decreases with increasing the anodic potential.The depth-composition profile of the passive film has revealed that an inner oxidation proceeds in the oxide film/substrate interface. It is expected that oxygen ions duffusing inwards through the outer oxide film react with the substrate alloy to form the inner oxide layer.

采用高压釜电化学方法研究了Fe-26 Cr合金在高温硼酸盐溶液中的腐蚀行为，并利用俄歇电子能谱和氩离子刻蚀对合金表面进行了表征。随着固溶温度的升高（22 ℃ ~ 250 ℃），合金中铬成分稳定钝化膜的电位区变窄。合金试样在200 ℃阳极氧化90 min后，表面铬元素的富集量在自然电位处达到最大值，然后随阳极电位的升高而降低，钝化膜的深度-成分曲线表明，在氧化膜/基体界面处发生了内氧化。氧离子通过氧化膜与基体合金反应形成内氧化层。

项目成果

瀬尾眞浩: 防食技術.

Masahiro Seo：防腐蚀技术。

Masahiro Seo: "Study of Passive Film on Iron-base Alloy in High-Temperature-Boric Borate Solution" Boshoku Gijutsu.

Masahiro Seo：“高温硼酸硼酸盐溶液中铁基合金钝化膜的研究”Boshoku Gijutsu。