Features of theoretical models of hardening of piston aluminum alloys in aqueous electrolytes

Currently, an effective method of increasing the surface strength and heat resistance of the piston bottom is the method of electrical deposition of chemical coatings based on various compositions. The article deals with the theoretical aspects of the formation of oxide films on piston aluminum alloys during microarc oxidation. Possible schemes of formation of barrier and outer layers of surface coating in aqueous electrolytes are also considered. The mechanism of formation of the interface and possible schemes of deposition of nonmetallic inclusions on the surface are shown. The stepwise formation of oxide layers on the piston surface, which has a fundamental difference from conventional films obtained by anodizing, is described.