【摘要】 使用加速腐蚀试验和X射线光电子能谱(XPS)等手段,研究了A3钢镀锌层钼酸盐钝化膜的组成和性能．结果表明,钼酸盐钝化膜膜层厚度大于35 nm,钝化膜外层钼元素以Mo3+、Mo6+形式存在,主要组成为:MoO3,Mo(OH)3,Zn(OH)2, ZnO,ZnMoO4;钝化膜内层钼元素以Mo3+形式存在,主要由Mo2O3,Mo(OH)3,ZnO,ZnMo2O4组成．钝化膜表面层中的MoO42-具有抗氯离子等侵蚀性阴离子的破坏作用,使钝化膜具有阳离子选择性,提高镀锌钝化膜的耐蚀性能．更多还原

【Abstract】 The molybdate passivation film formed on galvanization layer of A3 steel was investigated. The results showed that the corrosion resistance increased by using molybdaye as the passivation agent, and the characteristic of passivition was close to use chromate as the passivation agent. The thickness of the passivation film was nearly to 35 nm and the passivition film was divided into two layers. The outer-layer was formed by Mo3+ and Mo6+, and the main of the outer layer were MoO3, Mo(OH)3, Zn(OH)2, ZnO and ZnMoO4. The in-layer was formed by Mo3+, and the main composition of the in-layer were Mo2O3, Mo(OH)3, ZnO, and ZnMo2O4. Because of existing of the anion MoO42- in the outer-layer, the passivition film has the characteristic of cation selection and it increases the corrosion resistance of the passivition film on the galvanization layer.更多还原