USA flag logo/image

An Official Website of the United States Government

Aircraft Corrosion Inspection by Electromagnetic Induction Spectroscopy

Award Information

Agency:
Department of Defense
Branch:
Air Force
Award ID:
67847
Program Year/Program:
2004 / SBIR
Agency Tracking Number:
F041-274-2161
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
GEOPHEX LTD.
605 Mercury Street Raleigh, NC -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2004
Title: Aircraft Corrosion Inspection by Electromagnetic Induction Spectroscopy
Agency / Branch: DOD / USAF
Contract: FA8501-04-M-0162
Award Amount: $97,981.00
 

Abstract:

This SBIR Phase I proposal will investigate a new methodology known as electromagnetic induction spectroscopy (EMIS) as a means of detecting and characterizing hidden corrosion in multi-layered airframe structures. This technique, in contrast to traditional single-frequency eddy current methods, records the in-phase and quadrature response of a specimen over a broad range of frequencies. The method then exploits a relationship between the loss of conducting material under the probe and the peak frequency of the quadrature component of the scattered magnetic field. This relationship provides a quantitative measure of the loss (or change) in conducting material under the sensor, which is indicative of corrosion. The proposed EMIS instrument will also incorporate a bucking scheme which eliminates the primary flux linking the sensing coil; this innovation greatly enhances sensitivity and dynamic range compared to conventional impedance-based eddy-current systems. This technique can result in scattered field measurements on the order of parts per million of the source field. The EMIS methodology will be tested in the Phase I effort by performing experimental tests on metallic samples with layers of varying thicknesses and conductivities to simulate metal depletion due to corrosion.

Principal Investigator:

Stephen J. Norton
Senior Scientist
9198398515
norton@geophex.com

Business Contact:

Steven Daib
Contract Administrator
9198398515
daib@geophex.com
Small Business Information at Submission:

GEOPHEX LTD.
605 Mercury Street Raleigh, NC 27603

EIN/Tax ID: 561378871
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No