High temperature annealing of the pickled sample, followed by secondary pickling desorption, has been attempted for further refining. 並嘗試在此後進行高溫退火以再次造成表面擴散偏聚，然後繼以二次酸洗去吸附除雜。
Experiments indicate that acetone exhibits the best degreasing effect and that well-arranged porous anodic alumina film is obtained without annealing and electropolishing. 實驗結果表明，採用丙酮除油效果最好，不經高溫退火和電化學拋光仍能得到高度有序的多孔陽極氧化鋁膜，使製備工藝得到了簡化。
