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采用多指标正交试验,系统研究了氢氧化钠(NaOH)、硅酸钠(Na_2SiO_3)、植酸(C_6H_(18)O_(24)P_6)以及纳米粒子Al_2O_3对镁合金表面复合阳极氧化膜耐蚀性和耐磨性的影响。利用扫描电镜和X射线衍射对优化配方下制备的复合氧化膜的形貌、成分及相组成进行了表征。结果表明,兼具优良耐蚀性和耐磨性的配方为:NaOH:50 g/L,Na_2SiO_3:100 g/L,C_6H_(18)O_(24)P_6:12 mL/L,Al_2O_3:5 g/L。优化配方下制备的复合氧化膜主要由MgO、Mg_2SiO_4和Al_2O_3组成,氧化膜表面连续致密,微孔细小均匀。
The multi-index orthogonal experiment was used to systematically study the effects of sodium hydroxide (NaOH), sodium silicate (Na_2SiO_3), phytic acid (C_6H_ (18) O_ (24) P_6) and nanoparticle Al_2O_3 on the composite anodic oxide film Erosion and abrasion resistance. The morphology, composition and phase composition of the composite oxide films prepared under the optimized formulation were characterized by scanning electron microscopy and X-ray diffraction. The results show that the formula with excellent corrosion resistance and wear resistance is as follows: NaOH: 50 g / L, Na 2 SiO 3: 100 g / L, C 6 H 18 O 24 P 6 6 mL / L Al 2 O 3 5 g / L. The composite oxide film prepared under optimized formulation is mainly composed of MgO, Mg_2SiO_4 and Al_2O_3. The surface of the oxide film is continuously dense and the pores are fine and uniform.