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New Coating & Metallizing Process of Refractory Metals & Compound in Molten Salt Bath

Research Project

Project/Area Number 15360401
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Metal making engineering
Research InstitutionTOYOHASHI UNIVERSITY OF TECHNOLOGY

Principal Investigator

TAKENAKA Toshihide  Toyohashi University of Technology, Department of Engineering, Associate Professor, 工学部, 助教授 (60197324)

Co-Investigator(Kenkyū-buntansha) KAWAKAMI Masahiro  Toyohashi University of Technology, Department of Engineering, Professor, 工学部, 教授 (30016597)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥13,700,000 (Direct Cost: ¥13,700,000)
Fiscal Year 2005: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2004: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2003: ¥9,400,000 (Direct Cost: ¥9,400,000)
KeywordsTi / disproportionation / coating / electroless plating / molten salt / steel / corrosion resistance / Mo / チタン合金 / 炭素鋼 / クロム / 析出 / NaCl-KCl / 鋼 / ステンレス鋼 / 温度変化 / フッ化物
Research Abstract

Coating and metallizing of refractory metal or its compound by using a disproportionation reaction in molten salt has been studied. Titanium coating in NaCl-KCl equi-molar melt with Ti chloride or fluoride at 1000-1200K was mainly examined in this study. The results are summarized as follows ;
1) The effects of some factors on the disproportionation reaction were clarified theoretically and experimentally. Titanium can be deposited by temperature change owing to the shift in the equilibrium. Titanium alloy coating should also be expected in the case that the substrate can form Ti alloy. Addition of fluoride in the bath may improve the rate of Ti deposition.
2) Titanium metal deposited on alumina substrate by the simple immersion for hours, while Ti compound was seen on quartz glass substrate. These deposits seemed particle-like, and a dense coating layer wasn't obtained. The temperature gradient in the bath seemed effective in the improvement in the deposition rate.
3) Dense and coherent Ti alloy layers up to 100μm were formed on Fe, Ni and carbon steel. The layer consisted of some layers with different composition, and almost the same Ti alloy layer was obtained in the bath with TiCl_8 and K_2TiF_6. The change in the formation rate indicated that the diffusion of the elements in the formed layer controlled the formation rate of the layer. Corrosion resistance of steel against saline was remarkably improved by our Ti alloy coating. A dense and coherent Ti metal layer of a few μm was obtained on stainless steel, and Cr seemed to influenced the peculiar behavior of stainless steel. Deposition in LiCl-KCl eutectic melt at lower temperature was also tried in this study, but enough Ti deposit wasn't obtained.
4) MoO_2 was deposited on metal substrates in the melt with K_2MoO_4, while no deposit was obtained on ceramic.

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (11 results)

All 2006 2005 2004 Other

All Journal Article (10 results) Publications (1 results)

  • [Journal Article] 溶融塩化物中での不均化反応を用いたチタン合金コーティング2006

    • Author(s)
      室昌孝, 宮澤俊輔, 竹中俊英, 川上正博
    • Journal Title

      日本金属学会誌 第70巻2号

      Pages: 126-129

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Coating of Titanium Alloy by Using Disproportionation Reaction in Molten Chloride2006

    • Author(s)
      M.Muro, S.Miyazawa, T.Takenaka, M.Kawakami
    • Journal Title

      J.Japan Inst.Metals vol.70(2)

      Pages: 126-129

    • NAID

      10017283530

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Coating of Ti alloys by disproportination reaction in molten salt2005

    • Author(s)
      Masataka Muro, Shunsuke Miyazawa, Toshihide Takenaka, Masahiro Kawakami
    • Journal Title

      Proceedings of 1st Asia and 8th China Japan Bilateral Conference on Molten Salt Chemistry and Technology

      Pages: 116-117

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Coating of Ti and Ti Alloys by disproportionation Reaction in Molten Salt2005

    • Author(s)
      Toshihide Takenaka, Shunsuke Miyazawa, Masataka Muro, Masahiro Kawakami
    • Journal Title

      Proceedings of 7th International symposium on Molten Salts Chemistry & Technology Vol.1

      Pages: 215-218

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Coating of Ti alloys by Disproportination reaction in molten salt2005

    • Author(s)
      M.Muro, S.Miyazawa, T.Takenaka, M.Kawakami
    • Journal Title

      Proc.1st Asia and 9th China-Japan Bilateral Conf.on Molten Salt Chem.and Tech.

      Pages: 116-117

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Coating of Ti and Ti Alloys by Disproportionation Reaction in Molten Salt2005

    • Author(s)
      T.Takenaka, S.Miyazawa, M.Muro, M.Kawakami
    • Journal Title

      Proc.7th Intern.Symp.on Molten Salts Chem.& Tech. vol.I

      Pages: 215-218

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Coating of Ti and Ti Alloys by disproportionation Reaction in Molten Salt2005

    • Author(s)
      Toshihide Takenaka, Shunsuke Miyazawa, Masataka Muro, Masahiro Kawakami
    • Journal Title

      Proceedings of 7th International Symposium on Molten Salts Chemistry & Technology Vol.1

      Pages: 215-218

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Coating of Ti alloys by disproportination reaction in molten salt2005

    • Author(s)
      Masataka Muro, Shunsuke Miyazawa, Toshihide Takenaka, Masahiro Kawakami
    • Journal Title

      Proceedings of 1st Asia and 9th China Japan Bilateral Conference on Molten Salt Chemistry and Technology

      Pages: 116-117

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Dependence of Titanium Deposition upon Its Ionic State in Molten Salt2004

    • Author(s)
      Toshihide Takenaka, Masahiro Kawakami, Naoyuki Suda
    • Journal Title

      Materials Science Forum 449-452

      Pages: 453-456

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Dependence of Titanium Deposition upon Its Ionic State in Molten Salt2004

    • Author(s)
      T.Takenaka, M.Kawakami, N.Suda
    • Journal Title

      Materials Science Forum vol.499-452

      Pages: 453-456

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Publications] Toshihide Takenaka, Masahiro Kawakami, Naoyuki Suda: "Dependence of Titanium Deposition upon Its Ionic State in Molten Salt"Materials Science Forum. 449-452. 453-456 (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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