Abstract

To increase wear resistance, corrosion resistance, protection from aggressive environments during the production and repair of automotive equipment, various methods of intensifying the application of electrolytic deposits to their working surface are used.

When an electric current passes through the electrolyte, it dissociates with the formation of charged particles. The electrochemical process takes place with the participation of charged particles at the boundary of the phase distribution. between electronic and ion conductors. At the cathode, reduction reactions occur with the release of chromium deposits and the release of hydrogen. At the anode, oxidation reactions occur with the release of oxygen. Thus, in the process of electrolysis, gas bubbles are released and move in the anode-cathode space.

With the intensification of the chrome plating process (increased current densities) and the coating of long parts, the intensity of release of gaseous electrolysis products increases, which has a greater effect on the filling of the anode-cathode space with moving gas bubbles. As a result of filling the interelectrode space with gaseous products of electrolysis, the conductivity of the electrolyte changes, which leads to uneven deposition of chromium along the length of the part. In the work, a mathematical model was developed, which allows taking into account the influence of the release and movement of gas bubbles on the uniformity of galvanic deposits.

Keywords:relative gas filling; perimeter of electrodes; specific electrical conductivity; turbulation of the electrolyte.

FULL TEXT (in Ukrainian)

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The article was submitted 30.09.2024

© Chaban S.H., Kovra O.V., Artsybasheva N.M., Matsei R.O., 2024
Creative Commons Attribution 4.0 International License (CC BY 4.0)