Rebrova E. Structure and functional properties of coating on aluminum alloys obtained by microarc oxidizing

Object of research: process of formation of coatings on the aluminum alloys formed in a mode anode-cathodic microarc oxidizing. The purpose of research: definition of the basic laws of formation of structure and properties of functional coatings at microarc processing aluminum and its alloys; a choice of optimum conditions of electrolysis for aluminum alloys which provide the maximal wear resistance and corrosion resistance of coatings. Methods of research: optical and raster electronic microscopy; X-ray analysis; tests for friction, deterioration, porosity, corrosion resistance, electric durability, a roughness and microhardness. Theoretical and practical results: electrolysis modes for different aluminum alloys which provide course of process in a mode of microarc discharge are obtained; the technique of reception uniform on thickness of functional coatings on difficult surfaces of products from aluminum and its alloys is developed. Novelty: existence of critical thickness of MAO-coatings at which achievement transition from an initial single-phase structure to biphase or three-phase is carried out that determines interrelation of thickness, phase structure, structure and properties of received coatings is established; optimum conditions electrolysis, which allowed to receive coatings with the set properties on different aluminum alloys are defined. The degree of the introduction: it is introduced on KACB, KCBE, "Thermopack - engineering". The branch of the use: machine building.