Controlled Synthesis of Multifunctional Coatings by Micro-Arc Oxidation Method

Abstract

The article is devoted to the development of the methodology for the controlled synthesis of protective coatings by the micro-arc oxidation method in order to improve the efficiency of this technology and the quality of the obtained oxide layers. Methodology includes a mathematical model of a galvanic cell based on an equivalent electrical circuit, as well as a model of the interconnections between the technological parameters of the micro-arc oxidation (MAO) process and the properties of the obtained oxide layers based on graph theory. The indicated dependences are formalized using methods of regression and correlation analysis of experimental data. A technique for the controlled synthesis of MAO coatings using the obtained regression equations is proposed. The structure and functioning algorithm of an intelligent automated system for the controlled synthesis of MAO coatings are developed. A prototype of this system was used to obtain experimental dependences of reaction parameters on the influence parameters of the micro-arc oxidation process.

Analysis of the current density and electrolyte composition influence on the quality of micro-arc coatings

“…Coatings were obtained using the developed automated system [15] (Figure 1) in the anode-cathode mode when the anode and cathode currents are equal, at a low current (0.125 A or 0.25 A). Different current densities were obtained by varying the sample surface area (wire length).…”