Tonkonog N. Plasma electrolytic oxidation of aluminium in alkaline solutions

Processes on the aluminium anode in alkaline electrolyte under action of electric discharges. An establishment the regularities of plasma electrolytic oxidation of aluminium. Methods: chronopotentiometry; optical microscopy; X-ray structure analysis; the gas analysis; digital filming. The model of physical and chemical processes is suggested and conditions of the approach of a plasma regime are found. A model for the oxide film growth in alkaline solutions is proposed. Complex research of a spark stage is carried out and thermal model of the discharge is developed. Main principles of the organisation of the aluminium plasma electrolytic oxidation for obtain coatings with the maximum speed and efficiency are formulated. Sphere of application - machinebuildin, radioelectronics.