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研究了Al含量对Al-Mg2Si复合涂层耐磨蚀性能的影响.采用电化学测试仪、腐蚀-磨损试验机观察Al含量为80％、60％、40％和20％的Al-Mg2Si涂层的开路电位和摩擦因数,并采用扫描电镜(SEM)和超景深三维显微镜表征涂层磨痕特征.结果表明,Al-Mg2Si涂层的电位较AZ31B镁合金基体正移,且Al含量越低电位正移越明显.Al含量为20％的Al-Mg2Si涂层电位正移最多,正移了0.528 8 V,腐蚀电流密度最小,为3.298×10-3 mA/cm2.Al加入量越少,涂层的磨损率和摩擦因数越小,当Al含量为20％时两者均达到最小值,分别为4.27×10-3 mm3/(N·mm)和0.78.“,”The effects of Al content including 80％,60％,40％,20％ content on the tribocorrosion properties of Al-Mg2Si composite coating were investigated.The open circuit potential,frictional coefficient,corrosion resistance and tribocorrosion behaviors of the coatings prepared were characterized by scanning electron microscopy,electrochemical testing,reciprocating-sliding tribometer and ultra-depth three-dimensional microscope.The results reveal that the potential of Al Mg2Si coating is the higher than that of AZ31B magnesium alloy,and with decreasing in the content of Al,the potential shift is increased.The positive displacement of Al-80Mg2Si coating is the most,which is shifted 0.528 8 V,and the corrosion current density is 3.298× 10-3 mA/cm2.Furthermore,with decreasing in Al addition,the wear rate and friction coefficient of the coating are decreased.The wear rate and friction coefficient reach 4.27 X 10-3 mm3/(N · mm) and 0.78,respectively,with 20 ％ Al content.