Study in replacement of rare metals alloying with weathering steels using artificial steel rust particles and development of high corrosion resistant steels
| Project/Area Number |
26420739
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Material processing/Microstructural control engineering
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| Research Institution | Shimane University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 人工鉄さび粒子 / 耐候性鋼 / 高耐食鋼材 / 腐食・防食 / 合金金属 / レアメタル代替金属 / 形態制御 / 組成制御 / 人工鉄さび / 大気腐食 / 保護性さび粒子層 / 人工さび / 分子吸着 |
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| Outline of Final Research Achievements |
This study was aim to clarify the influence of alloying metals in weathering steels on the formation, density and stability of steel rust layer using artificial steel rust particles and to elucidate the replacement of rare metals alloying with weathering steels. The results obtained were summarized as follows. (1) Alloying Cr and Cu in weathering steels form the fine gamma-FeOOH rust particles, but no significant influence of Ni and Ti is recognized. (2) Adding Ni(II) and Cu(II) inhibit the formation of magnetite rust to produce fine alpha-FeOOH rust particles. This tendency can be found in the case of Sn(II)and La(III) addition, suggesting that Sn and La are useful alloying metals for replacement of rare metals in weathering steels. (3) The Cr(III) addition in Evans cycle suppresses the magnetite formation to generate nano-sized alpha-FeOOH rust particles.
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Report
(4 results)
Research Products
(33 results)
