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Thermochemics and kinetics of the hot dip galvanizing reaction by electrochemical method.

Research Project

Project/Area Number 06650835
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Metal making engineering
Research InstitutionNagoya Institute of Technology

Principal Investigator

YAMAGUCHI Shu  Nagoya Institute of Technology, Department of Materials Science and Engineering, Associate Professor, 工学部, 助教授 (10182437)

Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1994: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsChemical potential / Hot dip galvanizing / Activity / CGL / Aluminum / Phase stability / Phase diagram / Phase transformation / 溶解亜鉛メッキ / ドロス / 濃淡電池 / Fe / Zn
Research Abstract

Thermochemical properties of liquid Zn-Al-Fe ternary alloys equilibrated with so-called dross phases, which are solid Fe-Zn and Fe-Al intermetallic compounds, have been made by an emf method using Al concentration cell composed of composite mixed chloride and sodium beta-alumina solid electrolytes.The construction of the cell can be expressed as follows.
JA01HY
The emf of the cell is written by the following Nernst's equation.
JA02SU
The chemical potential of Al in the alloys has been obtained as a function of temperature from the emf measurements, and the potential diagram has been constructed to illustrate the stability domain of the intermetallic compounds in equilibrium with liquid phses as functions of Al potential and temperature.
The present results indicate that the delta+Fe_2Al_5+liq. threephase region, which corresponds to the boundary of the stability domain of delta_1 and Fe_2Al_5, branches into GAMMA_1+Fe_2Al_5+liq. regions at 460゚C,suggesting that GAMMA_1 phase becomes stable … More below this temperature. The GAMMA_1 phase showed marked grain growth and the solubility of Al was found to be higher than thatin delta_1 phase. From the comparison of metallographic observation of both GAMMA_1 and delta_1, the present author suggest the mechanism of transformation and growth of GAMMA_1 phase from delta_1 phase. The present observation that the GAMMA_1 phase can coexist with liquid phase was also confirmedby the results that the bottom dross sampled at CGL pot was the single phase of GAMMA_1. Also suggested by the inflection of emt-temperature relationship was the possible existence of the higher order transition in delta_1 phase, which is termed as delta'_1 phase, and the stability domain of delta'_1phase is illustrated in the potential stability diagram. Details of the structural information of this phase, however, is not fully established at this moment. Further discussion has been made based on the compositional analysis of the dross sample by illustrating the isothermal section of the ternary composition phase diagram with the comparison with the previous reports. Based on both potential stability diagram and the composition diagram, experimental results for simultaneous measurement of spatial distribution of both temperature and Al potential in the CGL pot has been analyzed, and the formation mechanism of GAMMA_1 phase in the pot hasbeen discussed in conjunction with the surface damage by the grain-grown dross particles suspended in the molten zine in the pot. Less

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] 菊地英文ほか: "亜鉛溶アルミ濃度センサーの溶融亜鉛メッキ設備への適用方法の検討" 材料とプロセス(CAMP-ISIJ). 8. 658 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 山口 周ほか: "Phase Equilibria between Intermetallic Compounds in Hot Dip Galvanizing Bath using Al Concentration Cell" Proc.of Zinc and Lead '95. 880-889 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 山口 周ほか: "Phase Stability of Dross Phases in Equilibrium with Liquid Zn Measured by Al Sensor" Proc.of Galvatech '95. 1995. 787-794

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 山口 周ほか: "Develeopment of Al Sensor in Zn Bath for Continuous Galvanizing Processes" Proc.of Galvatech'95. 647-655 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 山口 周ほか: "亜鉛浴と平衡するドロスの相平衡" 材料とプロセス(CAMP-ISIJ). 8. 1555 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 山口 周ほか: "亜鉛浴中におけるΓ_1相の生成機構" 材料とプロセス(CAMP-ISIJ). 8. 1556 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yamaguchi: "Development of Al sensor for hot dip galvanizing Zn bath." Proc.of The 2nd Asian-Pacific General Galvanizing Conference (Kobe). 66-75 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yamaguchi, A.Sakatoku, K.Hayakawa, N.Abe, Y.Iguchi: "De-Aluminization Process of Recycled Zn using NaOH-and NaCl-ZnCl_2 Based Fluxes." Proc.of Internt'l Symp.on Extraction and Application of Zinc & Lead, (Sendai). 547-556 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yamaguchi, A.Sakatoku, H.Makino, Y.Iguchi: "Phase Equilibria between Intermetallic Compounds in Hot Dip Galvanizing Bath using Al Concentration Cell." Proc.of Internt'l Symp.on Extraction and Application of Zinc & Lead, (Sendai). 880-889 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yamaguchi, N.Fukatsu, H.Kimura, K.Kawamura, Y.Iguchi, and T.O-Hashi: "Development of Al Sensor in Zn Bath for Continuous Galvanizing Processes." Proc.of Galvatech '95 (Chicago). 647-655 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yamaguchi, H.Makino, A.Sakatoku, and Y.Iguchi: "Phase Stability of Dross Phases in Equilibrium with Liquid Zn Measured by Al Sensor." Proc.of Galvatech '95 (Chicago). 787-794 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yamaguchi, A.Sakatoku, H.Makino, Y.Iguchi: "Phase cquilibria between dross phases and liquid Zn" CAMP-ISIJ. 7. 1530 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Kikuchi, M.Kawamura, M.Mori, M.Inoue, S.Yamaguchi, A.Sakatoku: "Method of application of Al sensor to galvanizing line" CAMP-ISIJ. 8. 658 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yamaguchi, H.Makino, A.Sakatoku, K.Terabe, Y.Iguchi: "Phase equilibria in liquid Zn-bearing Fe-Al-Zn intermetallics." CAMP-ISIJ. 8. 1555 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yamaguchi, A.Sakatoku, H.Makino, K.Terabe, Y.Iguchi: "Formation of GAMMA_1 phase Zn melts" CAMP-ISIJ. 8. 1556 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Kimura, J.Ueda, S.Yamaguchi, Z.Kozuka: "Development of Al sensor for Zn bath" CAMP-ISIJ. 8. 1559 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 菊池英文ほか: "亜鉛浴アルミ濃度センサーの溶融亜鉛メッキ設備への適用方法の検討" 材料とプロセス(CAMP-ISIJ). 8. 658- (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 山口 周ほか: "Phase Equilibria between Intermetallic Compounds in Hot Dip Galvanizing Bath using Al Concentration Cell" Proc. of Zine and Lead'95. 880-889 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 山口 周ほか: "Phase Stability of Dross Phases in Equilibrium with Liquid Zn Measured by Al Sensor" Proc. of Galvatech'95. 787-794 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 山口 周ほか: "Develeopment of Al Sensor in Zn Bath for Continuous Galvanizing Processes" Proc. of Galvatech'95. 647-655 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 山口 周ほか: "亜鉛浴と平衡するドロスの相平衡" 材料とプロセス(CAMP-ISIJ). 8. 1555- (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 山口 周ほか: "亜鉛浴中におけるΓ_1相の生成機構" 材料とプロセス(CAMP-ISIJ). 8. 1556- (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 山口,周: "Develeopment of Al sensor for hot dip galvanizing Zn bath" Proc. of 2nd Asian-Pacific General Galvanizing Conference. 66-75 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 山口,周ほか: "亜鉛浴とドロスの相平衡" 材料とプロセス(CAMP-ISIJ). 7. 1531 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 山口,周ほか: "亜鉛浴とドロスの相平衡" 資源・素材関係学協会合同秋季大会分科研究会資料(J)メタル・ロンダ・リング. 13-16 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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