Correlation between Terahertz Imaging and Electrochemical Impedance Measurements in Detection of Rust Regions in Coated Steel Plates

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2012/09/01

タイトル(英語): Correlation between Terahertz Imaging and Electrochemical Impedance Measurements in Detection of Rust Regions in Coated Steel Plates

著者名: Norikazu Fuse (Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry), Tetsuo Fukuchi (Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry), Tsuguhiro Takaha

著者名(英語): Norikazu Fuse (Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry), Tetsuo Fukuchi (Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry), Tsuguhiro Takahashi (Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry), Maya Mizuno (Applied Electromagnetic Research Institute, National Institute of Information and Communications Technology), Kaori Fukunaga (Applied Electromagnetic Research Institute, National Institute of Information and Communications Technology), Tatsuki Okamoto (Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry)

キーワード: rusting under coating，terahertz waves，electrochemical impedance

要約(英語): An accelerated aging test has been carried out to reveal correlations and differences between terahertz imaging and electrochemical impedance measurements in the detection of rust regions in coated steel plates. Intensity distribution measurements of reflected THz waves use the absorption characteristics of rust. Therefore, a good correlation between the THz reflection absorption and the proportion of the rust area relative to the total specimen area has been found. Electrochemical impedance gradually decreases with age, which shows the effectiveness of this measurement technique. A good correlation between values of THz absorption and film impedance indicates the possibility that THz measurements can evaluate the extent of degradation. The observed frequency spectra of the complex impedance are similar to what is observed in dielectric materials containing many charges. This is based on the assumption that impedance measurements affect the water blocking ability of the coating.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.132 No.9 （2012） 特集：テラヘルツ波

本誌掲載ページ: 709-715 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/132/9/132_709/_article/-char/ja/