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 sonoluminesccnce intensity dependencies on ph show similar behaviour indicating a strong correlation between the basic mechanisms involved. The marked correlation between the thresholds of the phenomena and between their intensities, suggests sonoluminescence as a potential monitor of erosion activity.
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