Structure Analysis of Thin Corrosion Products Film on Hot-dip Zn-Al Coatings by Synchrotron Radiation Photoemission Spectroscopy

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  • Nishihara Katsuhiro
    Corporate Res. and Development Lab., Sumitomo Metal Industries LTD. Graduate School of Engineering, University of Hyogo
  • Matsumoto Masamitsu
    Corporate Res. and Development Lab., Sumitomo Metal Industries LTD.
  • Kimoto Masanari
    Corporate Res. and Development Lab., Sumitomo Metal Industries LTD.
  • Kudo Takeo
    Corporate Res. and Development Lab., Sumitomo Metal Industries LTD. Graduate School of Engineering, University of Hyogo
  • Uchida Hitoshi
    Graduate School of Engineering, University of Hyogo
  • Haruyama Yuichi
    Lab. of Advance Sci. and Tech. for Industry, University of Hyogo
  • Kanda Kazuhiro
    Lab. of Advance Sci. and Tech. for Industry, University of Hyogo
  • Matsui Shinji
    Lab. of Advance Sci. and Tech. for Industry, University of Hyogo

Bibliographic Information

Other Title
  • 放射光‐光電子分光法を用いた溶融Ｚｎ‐Ａｌ系めっき上腐食生成皮膜の構造解析
  • 放射光-光電子分光法を用いた溶融Zn-Al系めっき上腐食生成皮膜の構造解析
  • ホウシャコウ コウデンシ ブンコウホウ オ モチイタ ヨウユウ Zn Alケイ メッキジョウ フショク セイセイ ヒマク ノ コウゾウ カイセキ

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Abstract

Structure of thin corrosion products film (CPF) on hot-dip Zn-Al alloy coated steel sheets were investigated by means of photoemission spectroscopy using synchrotron radiation of 160 eV and μ-FT-IR method, and were compared with those on Zn and Al pure metal sheets. CPF was prepared by 1 h and 16 h exposure in air saturated with water vapor at 323 K under the presence of NaCl particles.<br>As a result, the dominant component of the CPF on the Zn-0.2%Al coating changed from Zn(OH)2 to 2ZnCO3·3Zn(OH)2, while the CPF of Zn-55%Al alloy coating was consisted mainly of ZnCl2·4Zn(OH)2. And it was found that the structure near the surface of CPF, which was composed mainly of Al oxide, was transformed into the surface structure covered with Al chloride by humid exposure under the presence of NaCl.

Journal

  • Zairyo-to-Kankyo

    Zairyo-to-Kankyo 56 (7), 314-320, 2007

    Japan Society of Corrosion Engineering

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