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Proceedings Paper

Time-resolved infrared radiometry (TRIR) using a focal-plane array for characterization of hidden corrosion
Author(s): Jane W. Maclachlan Spicer; W. D. Kerns; Leonard C. Aamodt; Robert Osiander; John C. Murphy
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Paper Abstract

A time-resolved infrared radiometry technique is developed which is applicable to detection of hidden corrosion in airframe structures and which implements an InSb focalplane array. The TRIR method can measure the loss of skin thickness due to corrosion and can also detect second layer corrosion when a sealant material is present at a lap joint. It has also been shown that the presence of corrosion product can be detected on the back surface of an aluminum plate free standing in air. Other experimental studies suggest that the presence of corrosion product, corrosion thinning of the plate and morphology changes at the aluminum-corrosion layer interface all affect the TRIR temperature-time signature. This raises the possibility of separating these contributions experimentally.

Paper Details

Date Published: 6 April 1993
PDF: 12 pages
Proc. SPIE 1933, Thermosense XV: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (6 April 1993); doi: 10.1117/12.141962
Show Author Affiliations
Jane W. Maclachlan Spicer, Johns Hopkins Univ. (United States)
W. D. Kerns, Johns Hopkins Univ. (United States)
Leonard C. Aamodt, Johns Hopkins Univ. (United States)
Robert Osiander, Johns Hopkins Univ. (United States)
John C. Murphy, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 1933:
Thermosense XV: An International Conference on Thermal Sensing and Imaging Diagnostic Applications
Lee R. Allen, Editor(s)

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