チャンネルフロー電極法と電気化学インピーダンス法による金属の溶解反応の研究  [in Japanese] Electorochemical Analyses on Anodic Dissolution Mechanism of Metal  [in Japanese]

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Author(s)

    • 板垣 昌幸 ITAGAKI Masayuki
    • 東京理科大学 理工学部 工業化学科 Fac . Pure and Applied Chemistry, Dep. Science and Technology, Tokyo University of Science

Abstract

The author's group has studied the corrosion mechanisms of metals by using various electrochemical methods. In this article, some results concerning with the iron dissolution mechanism by a channel flow double electrode (CFDE) and an electrochemical impedance spectroscopy (EIS) are introduced. The contents of the present article are as follows.<br>(1) Transient analysis by CFDE in the time and frequency domains<br>The transient current for active dissolution of iron was separated to the currents for the formations of Fe (II) and the intermediate, calculating the Fe (II) detection current by CFDE in the frequency domain. The fractional coverage of the adsorbed intermediate on the iron surface was estimated from the calculated currents.<br>(2) Application of laser technique to CFDE<br>The adsorbed species on the polarized iron electrode were flushed out by the laser impact. The reformation processes of the adsorbed species were investigated.<br>(3) Determination of dissolved ions by spectrophotometry combined with CFDE<br>The CFDE was combined with the spectrophotometry with an optical fiber system. The Fe (II) and Fe (III) dissolved from the corroding iron can be determined simultaneously.<br>(4) EIS study on the iron dissolution<br>The Fe(II) dissolution efficiency Φ<sub>diss</sub> was measured with the electrochemical impedance by CFDE. The Φ<sub>diss</sub> is the frequency dependent parameter regarding with the time constant of the adsorption. The physical meanings of the Φ<sub>diss</sub> and the Faradaic impedance for iron dissolution were revealed.

Journal

  • Zairyo-to-Kankyo

    Zairyo-to-Kankyo 51(5), 201-205, 2002-05-15

    Japan Society of Corrosion Engineering

References:  26

Codes

  • NII Article ID (NAID)
    10008561391
  • NII NACSIS-CAT ID (NCID)
    AN10235427
  • Text Lang
    JPN
  • Article Type
    REV
  • ISSN
    09170480
  • NDL Article ID
    6163704
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-266
  • Data Source
    CJP  NDL  J-STAGE 
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