Infrared Reflectance Imaging for Environmentally Friendly Corrosion Inspection Through Organic Coatings
Final rept. Jan 2004-Dec 2008
NAVAL AIR SYSTEMS COMMAND JACKSONVILLE FL
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This report documents and presents the results and theory of both Infrared Reflectance Imaging Technique IRRIT and Blackbody Illumination Methods, which produce high fidelity images of corrosion and other structural defects under coatings. The technology exploits the difference in infrared IR reflection properties between corroded and non-corroded metallic surfaces. The IR energy passes directly through the coating and then reflects off the metallic substrate back through the coating and into an IR camera. Since the corroded areas do not reflect the IR energy as well as the non-corroded areas, a picture or image is generated by the IR camera much the same as observing the corrosion under standard visual techniques. The demonstration and validation measurements at NAVAIR Jacksonville P-3 Outer Mold Line and Oklahoma City Air Logistics Center KC-135 Inner Mold Line and B-52 Inner Mold Line illustrate clearly that the IRRIT is an improved method of corrosion inspection compared to the current baseline visual inspection method. IRRIT will give an engineering and corrosion control staff the capability to make sound engineering decisions as to whether to remove coatings or not to remove the coatings based on the reliable detection of corrosion through coatings.
- Coatings, Colorants and Finishes
- Properties of Metals and Alloys