Bauman Moscow State Technical University, Moscow, Russia:

G. N. Fadeev, Professor at the Subdepartment of Chemistry, Candidate of Сhemical Sciences, Doctor of Pedagogical Sciences, e-mail: gerfad@mail.ru
V. S. Boldyrev, Associate Professor at the Subdepartment of Chemistry, Candidate of Сhemical Sciences

N. A. Bogatov, Post-Graduate Student at the Subdepartment of Chemistry

D. Mendeleev University of Chemical Technology of Russia, Moscow, Russia:
Yu. M. Averina, Associate Professor at the Department of Innovative Materials and Corrosion Protection, Candidate of Engineering Sciences

It is known that low-frequency acoustic vibrations affect many properties of metals. The end result of the impact is united by the general term: metal fatigue. Researches to solve a problem of corrosion resistance of metals in the field of acoustic low-frequency actions are carried out. The attention is focused on the processes that change the metal surface properties. It is established that the influence of acoustic low-frequency vibrations within both subsonic range (2–17 Hz) and the beginning of the sound range (20–60 Hz) affects the processes of the metal surface treatment in a certain way. The impact of low-frequency acoustic oscillations in the frequency range of 2–100 Hz on physical and chemical systems containing non-ferrous metals as components of sonochemical processes and transformations is studied. Experimentally determined are the optimal frequencies at which the acoustic vibrations effect becomes a maximum, as well as the conditions for process conduction in the field of low-frequency acoustic impact for practically important systems: HCl – H₂O₂ – Cu; FeCl₃ – Cu; KI – I₂ – Cu; HCl – H₂O₂ – Al; KI – I₂ – Fe. Application of low-frequency acoustic influence method allows to speed up the processes of surface treatment of metals from 2 to 5 times. The study of the interaction of electrolyte solutions with metals in the field of low-frequency effects allows us to find out the mechanism of these interactions and to use the acquired information to develop corrosion protection measures for metals and alloys, as well as to propose new process flowsheets for surface treatment of structural materials.

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