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Proceedings Paper

Evaluation of high-sensitivity magnetic imaging for hidden corrosion
Author(s): Andrew D. Hibbs; Russell Chung; J. Scott Pence; Quinn C. Talley; Thomas A. Sage
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Paper Abstract

The magnetic signature associated with electrochemical corrosion in standard aircraft lap joints has been investigated with a superconducting quantum interference device (SQUID) magnetometer. Preliminary results on both spatial and temporal scans of single aluminum electrodes and lap joint samples exposed to dilute NaOH are presented for the first time. We have observed definite corrosion signals from a wide variety of aluminum samples, in all physical orientations relative to the instrument, down to an electrolyte concentration of 0.01 M. We have also detected natural filiform corrosion taking place in a dry 40 year old joint not exposed to additional corrosives. These preliminary results indicate that SQUID based magnetometers can be applied to detect corrosion in aging aircraft.

Paper Details

Date Published: 3 December 1993
PDF: 10 pages
Proc. SPIE 2001, Nondestructive Inspection of Aging Aircraft, (3 December 1993); doi: 10.1117/12.163844
Show Author Affiliations
Andrew D. Hibbs, Quantum Magnetics, Inc. (United States)
Russell Chung, Quantum Magnetics, Inc. (United States)
J. Scott Pence, Quantum Magnetics, Inc. (United States)
Quinn C. Talley, Quantum Magnetics, Inc. (United States)
Thomas A. Sage, Quantum Magnetics, Inc. (United States)

Published in SPIE Proceedings Vol. 2001:
Nondestructive Inspection of Aging Aircraft
Michael T. Valley; Nancy K. Del Grande; Albert S. Kobayashi, Editor(s)

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