Non-destructive evaluation of a corroded metal surface using terahertz waves

Hidetaka Kariya, Akihiro Sato, Tadao Tanabe, Kyosuke Saito, Katsuhiro Nishihara, Akira Taniyama, Yutaka Oyama

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

In this paper, the possibility of utilizing characteristic absorption spectra in the terahertz (THz) frequency region for the nondestructive evaluation of a corroded metal surface coated with an insulator is discussed. The infrared activity of corrosion products in response to THz waves was characterized. The THz absorption spectra of Al(OH)3 and ZnCl 2·4Zn(OH)2 powders, which are typical corrosion products in Zn-Al alloy, were measured with a frequency tunable terahertz light source based on difference frequency generation from a GaP crystal. Characteristic absorption peaks were observed in both spectra. Subsequently, THz reflection imaging was conducted on a metal surface partially covered with these corrosion products and a coating. By using the characteristic absorption peaks of the corrosion products, the spatial distribution of these products was clearly obtained. From the results, it was shown that THz waves can be applied to the non-destructive evaluation of corroded metal surfaces coated with insulators.

本文言語English
ホスト出版物のタイトルECS Transactions
出版社Electrochemical Society Inc.
ページ81-88
ページ数8
50
ISBN(電子版)9781607685395
DOI
出版ステータスPublished - 2013
外部発表はい

出版物シリーズ

名前ECS Transactions
番号50
50
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

ASJC Scopus subject areas

  • 工学(全般)

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