Measuring corrosion thinning by thermal-wave imaging

Lawrence D. Favro; Xiaoyan Han; Tasdiq Ahmed; Pao-Kuang Kuo; Robert L. Thomas

doi:10.1117/12.259112

14 November 1996 Measuring corrosion thinning by thermal-wave imaging

Lawrence D. Favro, Xiaoyan Han, Tasdiq Ahmed, Pao-Kuang Kuo, Robert L. Thomas

Proceedings Volume 2945, Nondestructive Evaluation of Aging Aircraft, Airports, and Aerospace Hardware; (1996) https://doi.org/10.1117/12.259112
Event: Nondestructive Evaluation Techniques for Aging Infrastructure and Manufacturing, 1996, Scottsdale, AZ, United States

Abstract

We describe an IR thermal wave imaging technique for making corrosion thinning determinations on aging aircraft skins. The technique uses pulsed surface heating and fast, synchronous IR imaging of subsurface structure, such as skin corrosion and disbonded doublers or tear straps. Sensitivity to corrosion thinning of less than two percent is demonstrated. Practical implementation of a simplified numerical measurement algorithm is presented, and the results are compared with profilometry and ultrasonic measurements of calibration standards. Examples are presented of thermal wave imaging of fuselage skin corrosion of a B737 testbed aircraft in a hangar environment at the FAA's Aging Aircraft NDI Validation Center.

Citation Download Citation

Lawrence D. Favro, Xiaoyan Han, Tasdiq Ahmed, Pao-Kuang Kuo, and Robert L. Thomas "Measuring corrosion thinning by thermal-wave imaging", Proc. SPIE 2945, Nondestructive Evaluation of Aging Aircraft, Airports, and Aerospace Hardware, (14 November 1996); https://doi.org/10.1117/12.259112

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