Evaluation of Rebar Corrosion Environment in Concrete Using Admittance Analysis in Electrochemical Impedance Method

DOI Web Site Web Site 5 References
  • Itagaki Masayuki
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science Department of Pure and Applied Chemistry, Graduate School of Science and Technology, Tokyo University of Science Research Institute for Science & Technology, Tokyo University of Science
  • Inohira Kanaho
    Department of Pure and Applied Chemistry, Graduate School of Science and Technology, Tokyo University of Science
  • Watanabe Hikari
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science Department of Pure and Applied Chemistry, Graduate School of Science and Technology, Tokyo University of Science
  • Shitanda Isao
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science Department of Pure and Applied Chemistry, Graduate School of Science and Technology, Tokyo University of Science Research Institute for Science & Technology, Tokyo University of Science
  • Namimatsu Saki
    Central Japan Railway Company （JR Central）
  • Kakinouchi Ryuichiro
    Central Japan Railway Company （JR Central）
  • Hoshi Yoshinao
    Department of Physical Science and Engineering, Division of Materials Function and Design, Nagoya Institute of Technology

Bibliographic Information

Other Title
  • 電気化学インピーダンス法におけるアドミッタンス解析を用いたコンクリート内鉄筋腐食環境の評価
  • デンキ カガク インピーダンスホウ ニ オケル アドミッタンス カイセキ オ モチイタ コンクリート ナイ テッキン フショク カンキョウ ノ ヒョウカ

Search this article

Abstract

<p>Due to the strong alkalinity of the healthy concrete environment, a protective passivation film is formed on the surface of rebar and corrosion of the rebar is suppressed. However, there is a problem that rebars in concrete are corroded by external factors and the structure deteriorates. In order to understand the corrosive state of the rebar, it is necessary to grasp the surface condition of the rebar in concrete. Corrosion state of the rebar in concrete can be evaluated by measuring the electrochemical impedance. However, when the passive film is formed, the impedance describes only part of semicircle on the Nyquist plane, and it may be difficult to determine the passive film resistance. In this study, we evaluated the corrosive environment of rebars in concrete from admittance analysis with probe electrodes which are embedded in concrete. When the passive film was formed, a semicircle was observed in the admittance spectrum transformed from the impedance measurement results, and the film resistance could be obtained from the low frequency limit. In addition, probe electrodes were embedded in the concrete structure of viaduct of the Tokaido Shinkansen, and the corrosive state of rebar in concrete was investigated by using admittance analysis.</p>

Journal

  • Zairyo-to-Kankyo

    Zairyo-to-Kankyo 71 (1), 13-20, 2022-01-10

    Japan Society of Corrosion Engineering

References(5)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top