The preparation of micro-arc oxidation ceramic coatings in phosphate and silicate electrolyte was investigated respectively in this thesis. The thickness and the rate of weight growth of ceramic coatings in various process conditions were tested. The corrosion resistance of ceramic coatings was evaluated by polarization curves and electrochemical impedance spectroscopy in 3.5% NaCl solutions with different pH value. The surface morphology and phase composition of micro-arc ceramic coatings were analyzed usi...