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Acoustic Emission (AE)

Corrosion monitoring with AE is based on measuring acoustic sound waves that are emitted during the growth of microscopic defects, such as stress corrosion cracks. The sensors can thus essentially be viewed as microphones, which are strategically positioned on structures. The sound waves are generated from mechanical stresses generated during pressure or temperature changes. Background noise effects have to be taken into consideration and can be particularly troublesome in on-line measurements.