Diffuse reflectance FTIR of stains on grit blasted metals
- Oak Ridge Centers for Manufacturing Technologies, P.O. Box 2009, Oak Ridge, Tennessee 37831-8096 (United States)
Diffuse reflectance mid-infrared Fourier transform (DRIFT) spectroscopy has been applied to the detection of oil contamination on grit-blasted metals. The object of this application is to detect and discriminate between silicone and hydrocarbon oil contamination at levels approaching 10 mg m{sup {minus}2}. A portable FTIR spectrometer with dedicated diffuse reflectance optics was developed for this purpose. Using translation devices positioned by instructions from the spectrometer operating system, images of macroscopic substrates were produced with millimeter spatial resolution. The pixels that comprise an image are each a full mid-infrared spectrum with excellent signal-to-noise, each determined as individual files and uniquely saved to disc. Reduced spectra amplitudes, based on peak height, area, or other chemometric techniques, mapped as a function of the spatial coordinates of the pixel are used to display the image. This paper demonstrates the application of the technique to the analysis of stains on grit-blasted metals, including the calibration of the method, the inspection of substrates, and the migration of oil contamination. {copyright} {ital 1998 American Institute of Physics.}
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 641491
- Report Number(s):
- CONF-970812-; ISSN 0094-243X; TRN: 9817M0017
- Journal Information:
- AIP Conference Proceedings, Vol. 430, Issue 1; Conference: 11. international conference on Fourier transform spectroscopy, Athens, GA (United States), 10-15 Aug 1997; Other Information: PBD: Jun 1998
- Country of Publication:
- United States
- Language:
- English
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