中文摘要：

为研究PAA的生长机理，设计了铝在3种电解液中的阳极氧化，通过SEM和阳极氧化曲线详细分析了规则圆柱形孔道和表面不规则孔洞产生的原因。电解液中阴离子使氧化膜变成了壁垒层和污染层两层。雪崩电子电流导致了在壁垒层／污染层界面上O2的析出。PAA中圆柱形孔道的形成是氧气析出的结果，传统的“酸性场致溶解”只在表面形成不规则的孔洞。当电解液中磷酸含量减少后，氧气析出持续的时间降低，O2析出停止后，多孔孔道被新生成的氧化铝封堵，最后PAA膜转变成BAA膜。

英文摘要：

The anodizing behaviors of aluminum in three kinds of electrolytes were investigated to understand the nature of porous anodie alumina （PAA） growth. The formation reason of the regular columnar channels and irregular pores was analyzed by SEM images and V-t curves. The membranes formed during the initial stage of anodization have two layers,i, e. anion contaminated alumina （ACA） and barrier anodic alumina （BAA） owing to the effect of anions in electrolyte. The avalanche electronic current gave rise to the evolution of oxygen in the ACA/BAA interface. The formation of regular columnar channels in PAA is ascribed to the oxygen evolution. The acidic dissolution only leads to the formation of the irregular pores on the ACA surface. The duration of oxygen evolution decreased with a decrease in concentration of phosphoric acid in the electrolyte. Once oxygen evolution stopped,porous channels were sealed by the new growing alumina,and then the PAA membranes became BAA membranes.