Aluminum structures exposed to the elements are susceptible to corrosion. Corrosion may cause various mechanical and structural deficiencies such as material thinning. It is desirable to rapidly detect and evaluate the properties of an aluminum substrate early in the corrosion process to avoid costly maintenance actions later. There are several nondestructive testing methods for this purpose. To investigate capabilities of millimeter wave, conventional eddy current, and flash thermography techniques for detection of large corrosion areas in aluminum substrates, two corroded samples were inspected with and without dielectric coating (appliqué). This paper presents the results of the c-scan imaging of these samples using the methods mentioned above. The attributes of these methods for detection and evaluation of large, severe and non-uniform corrosion areas with and without a dielectric coating are discussed.

Meeting Name

Review Of Progress In Quantitative Nondestructive Evaluation (2006: Jul. 30-Aug. 4, Portland, OR)


Electrical and Computer Engineering

Keywords and Phrases

Aluminum substrate; Corrosion; Dielectric coating; Eddy current; Millimeter wave; Nondestructive testing and evaluation; Thermography

International Standard Book Number (ISBN)


International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2007 American Institute of Physics (AIP), All rights reserved.

Publication Date

01 Jul 2007