The erosion activity on aluminium foils and the sonoluminescence intensity have been measured by continuous ultrasound irradiation at 24.1 kHz in distilled water with different ambient hydrostatic pressure from 1 atm to about 12 atm. The erosion rate as a function of the hydrostatic pressure reaches a maximum value after which it decreases until it disappears. The erosion rate and the sonoluminescence intensity dependences on ph show si milar behaviour indicating a strong correlation between the basi phenomena involved. The marked correlation between the threshold of the phenomena and between their intensities, suggests sonoluminescence as a potential monitor of erosion activity.
