在六偏磷酸钠电解液体系中添加草酸钛钾，利用微弧氧化技术，在铝合金表面制备有色陶瓷层。利用扫描电子显微镜（SEM）、X射线能谱仪（EDS）及光电子能谱仪（XPS）等，对不同草酸钛钾添加量制备的铝合金微弧氧化陶瓷层截面元素分布及物相组成进行测试并分析，进而探讨草酸钛钾在铝合金微弧氧化过程中的着色机制。结果表明：脉数500，脉宽80 μs，电流密度5 A/dm2，微弧氧化15 min，草酸钛钾浓度6 g/L时，陶瓷层外观质量较好，呈现蓝色；蓝色陶瓷层主要元素Al、O、Ti均匀分布于陶瓷层中，陶瓷层呈现蓝色主要是由Al2O3和TiO2共同作用的结果。

Colour ceramic coating can be prepared on the aluminum alloy surface by microarc oxidation(MAO) in the (NaPO3)6 electrolyte system with K2TiO(C2O4)2 addition. The sectional element distribution and phase composition of the MAO ceramic coating with different K2TiO(C2O4)2 addition on the aluminum alloy were analyzed by SEM, EDS, XPS and other methods. The coloring mechanism of K2TiO(C2O4)2 during the MAO process were discussed. The results show that: the ceramic coating has better surface quality with 6 g/L K2TiO(C2O4)2 addition under the established parameters when the number of pulses is 500, pulse width is 80 μs, current density is 5 A/dm2 , and MAO is for 15 min. The main elements Al, O, Ti uniformly distribute in the blue ceramic layer. Blue in the ceramic coating is mainly caused by the combined effects of Al2O3 and TiO2.