The results show that anodizing process can be divided into three stages:formation of dense film before sparking, formed porous film accompanied with a bit of small spark, and porous film stable growth along with bigger spark.

• 结果表明,在本研究给定工艺中,AZ91D镁合金的阳极氧化过程可分为三个阶段:电火花出现之前的致密层生成阶段,少量小电火花出现的多孔层生成阶段,出现较大电火花的多孔膜层稳定生长阶段。