28 March 1995 Corrosion/erosion detection in steel storage vessels using pulsed infrared imaging
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Historically, steel has been a material that has been shunned by the thermal imaging community because of its thermal characteristics and because in most applications it is relatively thick. A new approach to evaluate this material for thickness changes caused by corrosion/erosion is discussed within this presentation. Some of the structures that have been evaluated are above ground storage tank floors, boiler tubes used in power plant facilities, pipes, and 55 gallon drums. Thermal imaging techniques have been developed to locate areas of material thickness loss within these examples using a high resolution thermal imager and a `pulsed' or `stepped' heat source. The thermal energy from the heat source is directed toward the inspection surface and begins to conduct through the material thickness. Areas that have been reduced in thickness will form a thermal gradient on the inspection surface which is detected by the thermal imager.
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Maurice J. Bales, Maurice J. Bales, Chip C. Bishop, Chip C. Bishop, "Corrosion/erosion detection in steel storage vessels using pulsed infrared imaging", Proc. SPIE 2473, Thermosense XVII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (28 March 1995); doi: 10.1117/12.204866; https://doi.org/10.1117/12.204866

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