利用电子探针显微分析（EPMA）、X射线衍射（XRD）、能谱仪（EDS）、X射线光电子能谱分析（XPS）对Ce-Mn转化膜膜层进行表面和截面元素分布、相组成分析及沉淀物粉末的物相分析。结果表明，HF2-盐作为Ce-Mn转化膜溶液的促进剂，主元素F不是Ce-Mn复合膜层的组成成分，并不参与膜层的生长过程。通过对铝合金基体的腐蚀及其表面氧化膜(Al2O3)的溶解，使铝合金阴极区快速暴露，形成的[AlFe6]3-总量小于1.8mmol/L，完全溶于溶液。
Distribution of Ce-Mn conversion coating was analysed with electron probe micro analysis,energy disperse spectroscopy, X-ray photoelectron spectroscopy analysis, respectively. X-ray diffraction was used to study the features of the phase composition of the conversion coating and the sediment in the solution containing HF2- ions. The results show that the element F does not exist in the Ce-Mn conversion coatings, and HF2- does not participate in the growth process of the coating. The main purpose of HF2- ions was in the initial stage. Al matrix and its oxide film (Al2O3) in the surface of Al alloy were dissolved priority, so that cathode district which conducive to the formation of the coating exposures rapidly to the solution. Simultaneously, the total [AlF6]3- in the solution is less than 1.8 mmol/L, completely dissolved.
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