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采用磷酸盐与硅酸盐复合电解液体系,对ZL114A进行微弧氧化处理。所采用的微弧氧化工艺为:恒流±3A,400 Hz,占空比±50%,氧化时间60 min。所得的膜层厚度30~35μm。利用扫描电镜对膜层形貌及结构进行观察,利用XRD衍射仪对膜层的相成分进行分析,采用极化曲线评价膜层的耐蚀性能。结果表明:膜层的耐蚀性能与膜层中大量存在的α-Al_2O_3有关,经微弧氧化后,ZL114A表现出了良好的耐蚀性。
Using phosphate and silicate composite electrolyte system, ZL114A micro-arc oxidation treatment. The micro-arc oxidation process used is: constant current ± 3A, 400 Hz, duty cycle ± 50%, oxidation time 60 min. The obtained film thickness is 30 to 35 μm. The morphology and structure of the coating were observed by scanning electron microscopy. The phase composition of the coating was analyzed by XRD and the polarization curve was used to evaluate the corrosion resistance of the coating. The results show that the corrosion resistance of the film is related to the presence of α-Al 2 O 3 in the film. After the micro-arc oxidation, the corrosion resistance of ZL114A shows good corrosion resistance.