2013 Fiscal Year Final Research Report
Hydrogen Embrittlement Suppression Based on Protective Film-Oriented Compositional Design
| Project/Area Number |
24656078
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Tohoku University |
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Principal Investigator |
WATANABE Yutaka 東北大学, 工学(系)研究科(研究院), 教授 (10260415)
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| Co-Investigator(Kenkyū-buntansha) |
ABE Hiroshi 東北大学, 大学院工学研究科, 助教 (30540695)
MIYAZAKI Takamichi 東北大学, 大学院工学研究科, 技術職員 (20422090)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 水素脆化 / 環境強度 / 鉄鋼材料 / 酸化皮膜 / 水素透過試験 |
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| Research Abstract |
Oxide species of which solubility of hydrogen is extremely low has been investigated based on literature survey. It has been considered that Cr2O3 shows excellent performance from the suppression of hydrogen permeation point of view.
Hydrogen permeability of the oxide layer which formed on type 430 stainless steel with different condition of surface finish and oxidation treatment has been evaluated by electrochemical hydrogen permeation technique. Even a nanometer-scaled Cr rich oxide decrease the hydrogen permission current significantly. Different hydrogen permission current behaviors have been found for different type of surface finish and it may be due to the difference in protectiveness of oxide layer.
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