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采用动态恒电位极化曲线方法，结合金相分析对铝硫酸阳极氧化膜 在ＮａＣ１溶液中的孔蚀行为机理进行了研究初探，实验表明：铝经硫酸阳极氧化处 理后具有较高耐孔蚀性能，这是由于它表面生成了一层由阻挡层与多孔层所构成 的特殊双层结构所引起。阻挡层使孔蚀形核、长大需要更高的能量，而多孔层由于 受孔的大小、深度的影响，使Ｃ１－离子与腐蚀产物扩散困难，引起小孔的再钝化，孔 蚀电位正移。
The mechanism of pitting corrosion behavior of aluminum sulfate anodic oxidation film in NaC1 solution was studied by dynamic potentiostatic polarization curve combined with metallographic analysis. The experimental results show that aluminum has high corrosion resistance after anodizing with sulfuric acid , Which is due to the surface of the layer formed by the barrier layer and porous layer consisting of a special double-layer structure caused. The blocking layer causes the nucleation and growth of the pores to require nucleation and growth, which requires higher energy. However, due to the influence of the size and depth of the pores on the porous layer, diffusion of C1- ions and corrosion products is difficult, causing re-passivation of pores, Moving.