抄録
Thermal images of real pitting corrosions generated in alcoholic aqueous solutions were obtained by photoacoustic microscope (PAM). Using immersion tests and electrochemical methods, two different types of pitting corrosions were generated. Immersion testing of pure aluminum plate was conducted in sodium chloride and magnesium chloride alcoholic aqueous solutions. Nondestructive measurement of pitting corrosions was carried out using photoacoustic microscopy. The amplitude and phase of the photoacoustic (PA) signal were measured at every point of the scan and PA amplitude and phase images were reconstructed. The PA amplitude signal intensity varied with both the shape and depth of the pitting corrosion.
