Pages 207-208
In this paper, nondestructive imaging and observation of pitting corrosions on pure aluminum plate, that were generated in sodium halides alcoholic aqueous solution by photoacoustic microscope (PAM) has been investigated. Immersion tests of a pure aluminum plates were conducted in these solutions for 144 hours. Nondestructive measurement of real pitting corrosions was carried out using PAM. The amplitude and phase of the photoacoustic (PA) signal were measured at every point of the scan, and PA amplitude images were obtained. The PA amplitude signal intensity varied with both the shape and depth of the pitting corrosion.
