The thermal control coatings were prepared on the MB15 magnesium alloy by micro-arc oxidation in aluminates, silicates and phosphates systems. Results show that the three kinds of coating colors were black with typical micro porous structure. The phosphates coatings are thicker than the silicates coatings, while the silicates coatings are thicker than the aluminates coatings. Moreover, the roughness of phosphates coatings is similar with that of silicates coatings, and that of aluminates coatings is the min...