2023 Fiscal Year Final Research Report
Experimental Verification of Hydrogen Ingress Resistance of Microparticle Composite Coating by Heterophase Metal Material
Project/Area Number |
21K03763
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 18010:Mechanics of materials and materials-related
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Research Institution | Sasebo National College of Technology |
Principal Investigator |
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Project Period (FY) |
2021-04-01 – 2024-03-31
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Keywords | 水素脆化 / 製膜 / 水素侵入防止 |
Outline of Final Research Achievements |
We conducted exposure tests in high-temperature hydrogen gas on test pieces of various materials, including S25C steel, S45C steel, SCM435 steel, SUS304 steel, and FC200. As a result, we were able to create a coating containing multiple alloys on the coated parts, and achieved nearly 100% hydrogen ingress prevention by forming a coating part, except for FC200. In hydrogen infrastructure, there are components with complex shapes such as joints, and we found that it is possible to form a film on such components using the Al powder heat treatment coating method. We also conducted hydrogen ingress prevention analysis and conducted the verification of the coating.
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Free Research Field |
水素脆化
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Academic Significance and Societal Importance of the Research Achievements |
学術的意義:本研究成果により、水素侵入防止効果のある膜中の微粒子の界面状態と水素侵入防止効果の関連性についての重要な知見が得られました。また、製膜材の引張試験において、未チャージ材、水素チャージ材いずれにおいても、母材が塑性変形を開始すると膜にき裂が生じますが、内部起点の破壊となることが確認されました。 社会的意義:本研究成果が水素インフラに実用化されれば、母材中への水素侵入防止が期待できます。その結果、JARIなどに認められているSUS316Lなどの高コスト材に代わり、炭素鋼や低合金鋼に製膜した材料で代替可能となり、水素社会の安全性と経済性の両立が実現可能となると考えられます。
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