使用铝合金在硼-硫酸-草酸电解液中阳极氧化制备有序多孔层.初步探讨了恒流和降压阳极氧化过程膜层生长机理,采用扫描电镜(SEM)观察膜层微观形貌,结合电化学阻抗和动电位极化曲线研究不同阳极化工艺制备膜层试样在3.5％NaC1溶液中的耐蚀行为.结果表明,采用三段变压方式制备的阳极氧化膜表面孔密度降低,孔壁增厚,孔径为10～13 nm.疏孔膜层的电化学行为表明孔壁及膜层厚度增大能提高试样电荷传递电阻和耐蚀性能.
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