Feasibility study on the detection of corrosion of a cable metal shield using terahertz imaging

R. Sato, M. Komatsu, M. Mizuno, K. Fukunaga, Yoshimichi Ohki

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    Time-domain imaging and spectroscopic measurements were carried out using terahertz (THz) light in order to examine the feasibility of non-destructive corrosion diagnosis of a metallic shielding layer in a power cable. At first, the absorbance of the THz light was measured for various corroded copper, namely copper oxide, basic copper carbonate, and copper chloride. As a result, both basic copper carbonate and copper chloride were found to exhibit absorption clear and strong enough for the imaging. Next, a non-corroded copper plate and one of the corroded plates were placed on a metal plate without making an open interspace, and the THz light was irradiated and scanned in order to get two-dimensional images. When the plate is corroded to form either basic copper carbonate or copper chloride, the intensity of reflected light becomes small compared with the non-corroded copper plate. The reason for this seems that the THz light was scattered more at the surface of the corroded copper plate and was absorbed more by the corrosion. These phenomena indicate that non-destructive diagnosis to detect corrosion of a shield metal is possible.

    Original languageEnglish
    Title of host publicationAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
    Pages72-75
    Number of pages4
    DOIs
    Publication statusPublished - 2011
    Event2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2011 - Cancun, Mexico
    Duration: 2011 Oct 162011 Oct 19

    Other

    Other2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2011
    CountryMexico
    CityCancun
    Period11/10/1611/10/19

    Fingerprint

    Copper
    Cables
    Metals
    Corrosion
    Imaging techniques
    Chlorides
    Carbonates
    Plate metal
    Copper oxides
    Shielding
    copper carbonate

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering

    Cite this

    Sato, R., Komatsu, M., Mizuno, M., Fukunaga, K., & Ohki, Y. (2011). Feasibility study on the detection of corrosion of a cable metal shield using terahertz imaging. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP (pp. 72-75). [6232599] https://doi.org/10.1109/CEIDP.2011.6232599

    Feasibility study on the detection of corrosion of a cable metal shield using terahertz imaging. / Sato, R.; Komatsu, M.; Mizuno, M.; Fukunaga, K.; Ohki, Yoshimichi.

    Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2011. p. 72-75 6232599.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Sato, R, Komatsu, M, Mizuno, M, Fukunaga, K & Ohki, Y 2011, Feasibility study on the detection of corrosion of a cable metal shield using terahertz imaging. in Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP., 6232599, pp. 72-75, 2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2011, Cancun, Mexico, 11/10/16. https://doi.org/10.1109/CEIDP.2011.6232599
    Sato R, Komatsu M, Mizuno M, Fukunaga K, Ohki Y. Feasibility study on the detection of corrosion of a cable metal shield using terahertz imaging. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2011. p. 72-75. 6232599 https://doi.org/10.1109/CEIDP.2011.6232599
    Sato, R. ; Komatsu, M. ; Mizuno, M. ; Fukunaga, K. ; Ohki, Yoshimichi. / Feasibility study on the detection of corrosion of a cable metal shield using terahertz imaging. Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2011. pp. 72-75
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    abstract = "Time-domain imaging and spectroscopic measurements were carried out using terahertz (THz) light in order to examine the feasibility of non-destructive corrosion diagnosis of a metallic shielding layer in a power cable. At first, the absorbance of the THz light was measured for various corroded copper, namely copper oxide, basic copper carbonate, and copper chloride. As a result, both basic copper carbonate and copper chloride were found to exhibit absorption clear and strong enough for the imaging. Next, a non-corroded copper plate and one of the corroded plates were placed on a metal plate without making an open interspace, and the THz light was irradiated and scanned in order to get two-dimensional images. When the plate is corroded to form either basic copper carbonate or copper chloride, the intensity of reflected light becomes small compared with the non-corroded copper plate. The reason for this seems that the THz light was scattered more at the surface of the corroded copper plate and was absorbed more by the corrosion. These phenomena indicate that non-destructive diagnosis to detect corrosion of a shield metal is possible.",
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