AZ31B镁合金表面硅烷处理研究  

SURFACE TREATMENT ON THE AZ31B MAGNESIUM ALLOYS BY SILANIZATION

作　　者：张津[1] 吴超云[1] 黄福祥[2] 张微[2] 

机构地区：[1]北京科技大学材料学院,北京100083 [2]重庆工学院材料科学与工程学院,重庆400050

出　　处：《中国腐蚀与防护学报》2008年第3期146-150,共5页Journal of Chinese Society For Corrosion and Protection

基　　金：重庆市重点自然科学基金(CSTC,200413A4002)

摘　　要：采用硅烷溶液浸湿处理在AZ31B镁合金表面生成一层保护膜,采用扫描电镜、金相显微镜及体式显微镜观察试样表面形貌,并通过傅立叶红外光谱(FTIR)对硅烷膜与基体的键合进行测试分析;采用盐水浸泡、动电位极化曲线研究硅烷膜层的耐腐蚀性能,并与磷化膜层进行对比。结果表明:AZ31B镁合金经硅烷化处理,可以在其表面生成一层极薄的透明硅烷膜层,该膜层平整致密,对镁合金的自腐蚀电位影响不大,但大幅度降低了镁合金的自腐蚀电流密度,很好地抑制了镁合金的腐蚀。The protective film was prepared by immersion magnesium alloy AZ31B in silane solution. The surface morphologies of specimen were analyzed by using scanning electron microscope （SEM） and optical microscope. The bond adherence between silane film and substrate was researched by fourier transform infrared spectrography （FTIR）. The corrosion resistance of film was analyzed by salt water immersion and polarization test and the corrosion property of silane film has been compared with phosphate film. The results showed that a very thin transparent, as well as smooth and compact film was prepared on the AZ31B magnesium alloys by immersion in silane solution. The polarization voltage has been hardly affected by silane film, however the polarization current density decreased sharply for the specimen compared with the bare magnesium alloys. So the corrosion resistance of magnesium alloys was greatly improved by silane treatment.

关 键 词：硅烷处理 AZ31B镁合金 耐腐蚀 极化 

分 类 号：TG174.36[金属学及工艺—金属表面处理]