| Project/Area Number |
21K14446
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 26060:Metals production and resources production-related
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| Research Institution | Tohoku University |
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Principal Investigator |
Adachi Ken 東北大学, 多元物質科学研究所, 助教 (10880057)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | クロムめっき / 合金めっき / 濃厚水溶液 / 亜鉛めっき / 電気化学 / 三価クロム浴 |
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| Outline of Research at the Start |
飽和溶解度に近い高濃度で金属塩を溶解した濃厚水溶液は、通常の水溶液にはない電気化学特性を有することから近年注目を集めている。本研究では、濃厚系三価クロム浴をベースとした合金めっき浴を用いて、新規クロム系合金めっきの開発に取り組む。クロムと異種金属の合金めっき形成について系統的な調査を行うことで、従来のクロムめっきよりも優れた特性を有する合金めっき素材の創製を目指す。
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| Outline of Final Research Achievements |
With the aim of developing new chromium alloy plating, the electrodeposition behaviour of various metals in concentrated chloride baths was investigated and alloy plating tests were carried out on metal species expected to co-deposit with chromium. The electrode potentials of several metals in concentrated chloride baths were shifted lower than those in dilute baths, and some of them differed significantly from the thermodynamic data of reported complex species. It is suggested that these metal ions exist as unreported complex species. The co-deposition studies focused on the chromium-zinc combination as a metal species capable of co-depositing with chromium. In this system, a metallic film with a stacked structure of alternating chromium and zinc deposits was obtained, which was found to be a unique plating film produced only by this method.
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| Academic Significance and Societal Importance of the Research Achievements |
濃厚塩化物浴における各種金属の電析挙動を系統的に調査することで、金属電析浴としての濃厚水溶液系の利用可能性および有用性を明らかにできた。本研究を足がかりとして、新たな金属めっき素材の開発が進展すると期待される。また、クロム-亜鉛の組み合わせからなる共析膜は、従来法では得られない特異な層状構造を有する。これらの耐腐食性および物性や、共析機構について今後明らかにすることで、合金電析膜の構造と物性の関係に関しても新たな側面を明らかにできる可能性がある。
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