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Terahertz Spectrum Measurement of Corrosion Products on Coated Steel Sheet Surface

2018; Institute of Physics; Volume: MA2018-01; Issue: 14 Linguagem: Inglês

10.1149/ma2018-01/14/1096

2152-8365

Ryô Hasegawa, T. Kimura, Tadao Tanabe, Katsuhiro Nishihara, Akira Taniyama, Yutaka Oyama,

Photonic and Optical Devices

Our research group has developed a terahertz light source with high luminance and broadband, and is developing research on non-destructive inspection technology. As a nondestructive inspection technology for hot-dip galvanized steel sheets, we have built a terahertz spectrum database for corrosion products that may exist there. In this research, we aim to newly obtain spectral data of β-FeOOH. Absorption Spectrum is shown in Figure.1. Optical system is shown in Figure.2. The terahertz wave was generated by difference frequency mixing using a GaP crystal which is a nonlinear optical crystal. The standard powder sample was diluted with polyethylene powder and pelletized, and it was measured at room temperature by a permeation method. As a result of spectroscopic measurement, an absorption peak was obtained around 3.06 THz. On the day of the presentation, in addition to discussions on attribution of peaks, report together with ATR-FTIR results. Figure 1