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Nanoscale Analysis of [Steel/Ion] Reaction using SPring-8 Synchrotron Radiation

Research Project

Project/Area Number 15560628
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Material processing/treatments
Research InstitutionUniversity of Hyogo (2004-2005)
Himeji Institute of Technology (2003)

Principal Investigator

YAMASHITA Masato  University of Hyogo, Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (60291960)

Co-Investigator(Kenkyū-buntansha) UCHIDA Hitoshi  University of Hyogo, Graduate School of Engineering, Professor, 工学研究科, 教授 (30047633)
HANAKI Satoshi  University of Hyogo, Graduate School of Engineering, Research Associate, 工学研究科, 助手 (20336829)
KONISHI Hiroyuki  Japan Atomic Energy Institute, Kansai Research Institute, Senior Researcher, 関西研究所, 副主任研究員 (50354981)
MIZUKI Jun'ichiro  Japan Atomic Energy Institute, Kansai Research Institute, Maneger, 関西研究所, 放射光化学研究センター長 (90354977)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2005: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2004: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2003: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsSynchrotron Radiation / Corrosion / Steel / Ion / Corrosion Product / Rust / In Situ Observation / Nano Structure
Research Abstract

Even if infrastructure is especially needed in the 21^<st> century, it becomes difficult to maintain steel structure forming infrastructure due to 高齢化・財政危機. However, corrosion protection for apparatus, steel structure, plant and traffic system costs as large as 4000 billion yen in Japan. It is really necessary now to 確保 long-term life for steel structure for reducing the maintenance cost which is now increasing every year, so that 国家使命 to restructure and reduce 経済負担 will be 戦略的に realized. For this purpose, we should 対応策を構築 by understanding basic of corrosion degradation occurred by correlation between corrosion species and steel materials.
In this study, in order to understand corrosion degradation mechanism of steel materials, in situ observation of corrosion degradation and nano-structure analysis for corrosion product have been performed on steels using SPring-8 and Photon Factory synchrotron radiation X-rays. Reaction between iron ion and other alloying and environmental chemicals o … More n the steel surface and structure of corrosion product have been analyzed in terms of X-ray diffraction and X-ray absorption fine structure spectroscopies.
By X-ray absorption fine structure measurements, we found that 1) Cr as an alloying element is in goethite, which decreases goethite crystal size and increase protective ability of rust layer of steel, 2) Ni ion dissolved from steel is in a certain site of akaganeite and/or spinel type oxide in rust layer and decreases corrosion reaction in the environment with chloride ion, 3) the relative amount of each iron oxide in rust changes with environmental condition and with amount of alloying element, 4) chloride ion in the environment affect the structure of rust layer.
In situ observation of corrosion process on steels revealed that the ion species in electrolyte layer covering steel surface control the corrosion process and rust formation process. The rust formation processes of steels with different alloying contents were clarified by this in situ measurement.
These results obtained in this study indicate that alloying elements and environmental ion species greatly affect the structure and protective ability of the rust layer formed on the steel surface. Less

Report

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

    (28 results)

All 2005 2004 2003 Other

All Journal Article (25 results) Publications (3 results)

  • [Journal Article] Characterization of Rust Layer Formed on Fe, Fe-Ni and Fe-Cr Alloys, Exposed to C1-Rich Environment by C1 and Fe K-Edge XANES Measurements2005

    • Author(s)
      Hiroyuki Konishi et al.
    • Journal Title

      Materials Transactions 46・2

      Pages: 329-336

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Difference between Cr and Ni K-Edge XANES Spectra of Rust Layer Formed on Fe-Based Binary Alloys Exposed to C1-Rich Environments2005

    • Author(s)
      Hiroyuki Konishi et al.
    • Journal Title

      Materials Transactions 46・1

      Pages: 136-139

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Structure Analysis of Cation Selective Cr-goethite as Protective Rust of Weathering, Steel2005

    • Author(s)
      Hiroyuki Konishi et al.
    • Journal Title

      Materials Transactions 46・2

      Pages: 337-341

    • NAID

      10014417570

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Atmospheric Rust Formation Process on Fe, Fe-Cr and Fe-Ni Alloys under Wet/Dry Cycles Observed by Synchrotron Radiation X-ray Diffraction2005

    • Author(s)
      Masato Yamashita et al.
    • Journal Title

      Materials Transactions 46・5

      Pages: 1004-1009

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] In Situ Observation of Initial Rust Formation Process on Carbon Steel under Na2SO4 and NaC1 Solution Films with Wet/Dry Cycles Using Synchrotron Radiation X-rays2005

    • Author(s)
      Masato Yamashita et al.
    • Journal Title

      Corrosion Science 47・10

      Pages: 2492-2498

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Characterization of Rust Layer Formed on Fe, Fe-Ni and Fe-Cr Alloys, Exposed to Cl-Rich Environment by Cl and Fe K-Edge XANES Measurements2005

    • Author(s)
      H.Konishi, M.Yamashita, H.Uchida, J.Mizuki
    • Journal Title

      Materials Transactions 46, No.2

      Pages: 329-336

    • NAID

      10014417539

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Difference between Cr and Ni K-Edge XANES Spectra of Rust Layer Formed on Fe-Based Binary Alloys Exposed to Cl-Rich Environments2005

    • Author(s)
      H.Konishi, M.Yamashita, H.Uchida, J.Mizuki
    • Journal Title

      Materials Transactions 46, No.1

      Pages: 136-139

    • NAID

      10014323813

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Structure Analysis of Cation Selective Cr-goethite as Protective Rust of Weathering, Steel2005

    • Author(s)
      H.Konishi, M.Yamashita, H.Uchida, J.Mizuki
    • Journal Title

      Materials Transactions 46, No.2

      Pages: 337-341

    • NAID

      10014417570

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Atmospheric Rust Formation Process on Fe, Fe-Cr and Fe-Ni Alloys under Wet/Dry Cycles Observed by Synchrotron Radiation X-ray Diffraction2005

    • Author(s)
      M.Yamashita, H.Konishi, T.Kozakura, J.Mizuki, H.Uchida
    • Journal Title

      Materials Transactions 46, No.5

      Pages: 1004-1009

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] In Situ Observation of Initial Rust Formation Process on Carbon Steel under Na_2SO_4 and NaCl Solution Films with Wet/Dry Cycles Using Synchrotron Radiation X-rays2005

    • Author(s)
      M.Yamashita, H.Konishi, T.Kozakura, J.Mizuki, H.Uchida
    • Journal Title

      Corrosion Science 47(10)

      Pages: 2492-2498

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Atmospheric Rust Formation Process on Fe, Fe-Cr and Fe-Ni Alloys under Wet/Dry Cycles Observed by Synchrotron Radiation X-ray Diffraction2005

    • Author(s)
      Masato Yamashita
    • Journal Title

      Materials Transactions 46・5

      Pages: 1004-1009

    • Related Report
      2005 Annual Research Report
  • [Journal Article] In Situ Observation of Initial Rust Formation Process on Carbon steel under Na_2SO_4 and NaCl Solution Films with Wet/Dry Cycles Using Synchrotron Radiation X-rays2005

    • Author(s)
      Masato Yamashita
    • Journal Title

      Corrosion Science 47・10

      Pages: 2492-2498

    • Related Report
      2005 Annual Research Report
  • [Journal Article] X-ray Absorption Fine Structure spectra of Rust Layers on Fe-Based Binary Alloys Exposed to Cl Rich Environment2005

    • Author(s)
      Hiroyuki Konishi
    • Journal Title

      Proceedings of 16^<th> International Corrosion Congress

      Pages: 19-8

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Formation Process And Nanostructure Of Atmospheric Rust Layer On Fe-Based Binary Alloys Examined Using Synchrotron Radiation X-Rays2005

    • Author(s)
      Masato Yamashita
    • Journal Title

      Proceedings of 16^<th> International Corrosion Congress

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Formation process of atmospheric rust layer on Fe-based binary alloys2005

    • Author(s)
      Masato Yamashita
    • Journal Title

      Current Advances in Materials and Processes 18

      Pages: 1430-1430

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Nanostructure of Protective Rust Layer on Weathering Steel Examined Using Synchrotron Radiation X-rays2004

    • Author(s)
      Masato Yamashita et al.
    • Journal Title

      Materials Transactions 45・6

      Pages: 1920-1924

    • NAID

      10013136113

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] C1 K-Edge XANES Spectra of Atmospheric Rust on Fe, Fe-Cr and Fe-Ni, Alloys Exposed to Saline Environment2004

    • Author(s)
      Hiroyuki Konishi et al.
    • Journal Title

      Materials Transactions 45・12

      Pages: 3356-3359

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Nanostructure of Protective Rust Layer on Weathering Steel Examined Using Synchrotron Radiation X-rays2004

    • Author(s)
      M.Yamashita, H.Konishi, J.Mizuki, H.Uchida
    • Journal Title

      Materials Transactions 45, No.6

      Pages: 1920-1924

    • NAID

      10013136113

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Cl K-Edge XANES Spectra of Atmospheric Rust on Fe, Fe-Cr and Fe-Ni, Alloys Exposed to Saline Environment2004

    • Author(s)
      H.Konishi, M.Yamashita, H.Uchida, J.Mizuki
    • Journal Title

      Materials Transactions 45, No.12

      Pages: 3356-3359

    • NAID

      10014238490

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Nanostructure of Protective Rust Layer on Weathering Steel Examined Using Synchrotron Radiation X-rays2004

    • Author(s)
      Masato Yamashita
    • Journal Title

      Materials Transactions 45・6

      Pages: 1920-1924

    • NAID

      10013136113

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 放射光による鉄鋼の大気腐食研究2004

    • Author(s)
      山下 正人
    • Journal Title

      材料と環境 53・1

      Pages: 13-19

    • NAID

      10011960253

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 放射光を用いた鉄鋼腐食研究2004

    • Author(s)
      山下 正人
    • Journal Title

      ふぇらむ 9・10

      Pages: 699-704

    • NAID

      10013881223

    • Related Report
      2004 Annual Research Report
  • [Journal Article] IN SITU OBSERVATION OF INITIAL PROCESS OF RUST FORMATION ON STEEL UNDER WET/DRY CYCLES USING X-RAY DIFFRACTION SPECTROSCOPY2003

    • Author(s)
      Takayuki Kozakura
    • Journal Title

      Proc.13th Asian-Pacific Corrosion Control Conference

    • Related Report
      2004 Annual Research Report
  • [Journal Article] NANOSTRUCTURE OF PROTECTIVE RUST LAYER ON WEATHERING STEEL EXPOSED TO AN INDUSTRIAL ENVIRONMENT FOR 17 YEARS2003

    • Author(s)
      Masato Yamashita
    • Journal Title

      Proc.13th Asian-Pacific Corrosion Control Conference

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 放射光による保護性さびのナノ構造解析2003

    • Author(s)
      小西 啓之
    • Journal Title

      金属 73・8

      Pages: 71-78

    • Related Report
      2004 Annual Research Report
  • [Publications] 山下 正人: "放射光による鉄鋼の大気腐食研究"材料と環境. 53・1. 13-19 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Kozakura: "IN SITU OBSERVATION OF INITIAL PROCESS OF RUST FORMATION ON STEEL UNDER WET/DRY CYCLES USING X-RAY DIFFRACTION SPECTROSCOPY"Proc.13th Asian-Pacific Corrosion Control Conference. A19/1-A19/7 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Yamashita: "NANOSTRUCTURE OF PROTECTIVE RUST LAYER ON WEATHERING STEEL EXPOSED TO AN INDUSTRIAL ENVIRONMENT FOR 17 YEARS"Proc.13th Asian-Pacific Corrosion Control Conference. A10/1-A10/6 (2003)

    • Related Report
      2003 Annual Research Report

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

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