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在大气环境中、恒定压力作用下,使用镁铝共晶合金粉末作为连接剂在AZ91D镁合金表面进行覆铝处理。利用扫描电子显微镜分析了铝箔与镁合金结合界面的显微组织结构,通过电化学腐蚀试验及球盘磨损试验对覆铝试样表面的耐腐蚀性和耐磨性进行了测试。结果表明,结合界面由Al3Mg2层、Mg17Al12层、镁铝共晶层、镁铝锌化合物层组成,覆铝后试样的耐蚀性、耐磨性较AZ91D镁合金均有提高。
In atmospheric environment, constant pressure, the use of magnesium aluminum eutectic alloy powder as a connecting agent AZ91D magnesium alloy surface aluminum treatment. The microstructure of the bonding interface between aluminum foil and magnesium alloy was analyzed by scanning electron microscopy. The corrosion resistance and wear resistance of the aluminum coated specimen were tested by electrochemical corrosion test and ball disc wear test. The results show that the bonding interface consists of Al3Mg2 layer, Mg17Al12 layer, Mg-Al eutectic layer and Mg-Al-Zn compound layer. Compared with AZ91D magnesium alloy, the corrosion resistance and wear resistance of the samples after aluminum coating increase.