Investigation of the Effect of Low-Frequency Vibroacoustic Fields on Carbon Dioxide Absorption at the Liquid–Gas Interface

This work is a continuation of the study of the effect of low-frequency acoustic axial low-energy oscillations of the infrasonic and early audible frequency ranges on the speed of surface treatment of various structural materials, primarily materials used in radio electronics. Low-frequency vibration treatment of surfaces of various alloys and semiconductors is one of the most promising modern tasks facing the domestic radio-electronics industry. The use of low-frequency acoustic fields makes it possible to increase the speed of metal surface treatment processes two- to five-fold. The so-called “bubble” etching method, involving the passage of air bubbles through the etching solution during surface treatment, is widely applied at present. This method makes it possible to intensify the process of surface etching and to significantly increase its speed, up to threefold. Etching with an external acoustic field shows similar results. In the work, studies are carried out comparing the process of gas dissolution in the field of low-frequency influences at the liquid–gas interface with the process of bubbling gas passed through distilled water. The results of the experimental study are presented to explain the reason for the acceleration of the etching processes in a low-frequency acoustic field due to the absorption of gases located at the phase boundary. Comparisons of the acoustic effect with bubbling and diffusion flowing through the liquid–gas interface are given.