Structure Analysis of Cation Selective Cr-goethite as Protective Rust of Weathering Steel

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Author(s)

Abstract

We have performed extended X-ray absorption fine structure (EXAFS) analysis for artificial Cr-goethite to elucidate the local structure around Cr in Cr-goethite. The spectra were obtained using synchrotron radiation X-rays at the Photon Factory in Tsukuba. The first shell contributions were isolated by Fourier filtering the EXAFS data, and the inverse Fourier transformed single-shell data were analyzed using a curve fitting method. The results show that Cr is coordinated with (7±1) O<SUP>2−</SUP> ions. The protective characteristics of the Cr-goethite protective rust layer on weathering steel can be interpreted in terms of the O<SUP>2−</SUP> coordination around Cr<SUP>3+</SUP> resulting in the creation of negative fixed charge in the Cr-goethite particles.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 46(2), 337-341, 2005-02-20

    The Japan Institute of Metals and Materials

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Codes

  • NII Article ID (NAID)
    10014417570
  • NII NACSIS-CAT ID (NCID)
    AA1151294X
  • Text Lang
    ENG
  • Article Type
    SHO
  • ISSN
    13459678
  • NDL Article ID
    7257037
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z53-J286
  • Data Source
    CJP  NDL  J-STAGE 
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