This article shows the possibility of creating high wear-resistant and corrosion-resistant coating by plasma electrolytic oxidation (PEO) on the AlSi12Cu aluminum alloy. The combination of influencing parameters during processing allows to influencing of the set of quality indicators of coating, such as the thickness of the coating layer, microhardness, porosity, phase and elemental composition. The influence of technological modes and electrolyte composition on the structure and composition of the resulting coating has been established. The structural features of the modified layers was investigated, the effect of the capacitor capacitance on the installation and the duration of treatment on the structure and microhardness of the resulting coating was establishe
