| Project/Area Number |
23656447
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Material processing/treatments
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| Research Institution | Tohoku University |
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Principal Investigator |
MUTO Izumi 東北大学, 大学院・工学研究科, 准教授 (20400278)
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| Co-Investigator(Kenkyū-buntansha) |
HARA Nobuyoshi 東北大学, 大学院・工学研究科, 教授 (40111257)
SUGAWARA Yu 東北大学, 大学院・工学研究科, 助教 (40599057)
AKAO Noboru 東北大学, 大学院・工学研究科, 助手 (80222503)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 腐食防食 / 介在物 / 孔食 / ステンレス鋼 / マイクロ電気化学セル / 材料加工・処理 |
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| Research Abstract |
To analyze microscopic corrosion mechanisms of metals, a microelectrochemical system for in situ high-resolution optical microscopy was developed and applied to the real-time observation of pit initiation at MnS inclusion in stainless steels. It was directly observed that pits were initiated at the MnS/steel boundaries, and that deep trenches were generated at these boundaries during anodic polarization. The metal-oxide enriched surface layer on inclusions was found to be the predominant factor affecting the electrochemical properties and the corrosion protection ability of the inclusions.
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