Non-Destructive Corrosion Detection Using Terahertz Time-Domain Spectroscopy and Imaging

ORAL

Abstract

The objective of this project is to detect corrosion of manufactured metal underneath paint. The system used in this research is a commercial terahertz time-domain spectroscopy and imaging system. THz signals are generated and detected using optical excitation of biased semiconductor antennas with 100 femtosecond pulses from an 800 nm laser. Spectral images were of metal samples were taken at frequencies between 100 GHz and 1 THz using a variety of imaging modalities in both transmission and reflection. Prelimiary imaging data shows a clear distinction between corroded and clean metal concealed underneath a coat of paint.

–

Authors

  • Lindsay Owens

    Wright State University, Student

  • Doug Petkie

    AFRL/RX, AFRL/RX, Systran Systems Inc, UCSD, Los Alamos National Laboratory, Ohio Northern University, BFS, Germany, Florida State University, Monmouth College, Ohio Wesleyan University, Department of Chemical and Biomolecular Engineering, The University of Akron, Physics Department, John Carroll University, Department of Chemistry, Knight Chemical Laboratories, The University of Akron, Australian National University, Miami University, Oxford, OH, University of Cincinnati, University of Findlay, Naval Research Laboratory, Washington, DC 20375, Cleveland State University, Health Sciences Dept, Cleveland State University, Physics Dept, Cleveland State University, Bucknell University, Wright State University, Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB, Wright State University, Department of Physics, University of Puerto Rico, Department of Mechanical Engineer, Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB and UES, Inc., Department of Environmental Science and Policy, School of Science, Marist College, Poughkeepsie, NY 12601, USA, AFRL/711 HPW, EPA Sustainable Technology Division, University of Akron, Rose-Hulman Institute of Technology, Harvard University, LSU, Ohio University, Wittenberg University, Student

  • Douglas T. Petkie

    Wright State University, Professor

  • Jason Deibel

    Wright State University, Professor