结合我国西部盐湖大气的典型特征，重点研究铝合金在低湿度、高Mg2+气溶胶混和体系中的腐蚀机理。利用电化学方法定量分析气溶胶混和体系对铝合金表面润湿时间的影响，确定镁铝层状复合氢氧化物的形成条件，揭示Mg2+对铝合金大气腐蚀锈层形成及后续演变的影响规律；建立模拟铝合金盐湖大气腐蚀的试验方法，最终构建铝合金在典型盐湖气溶胶体系中的腐蚀模型。

The project reviews the aerosols in salt lake environment in Western China and examines the effects of magnesium chloride-based multi-component aerosols on atmospheric corrosion of LY12 aluminum alloy in low RH. The relationship between the salt aerosols and the mutual deliquescence relative humidity of the salt aerosols was characterized by electrochemical techniques. The main factors which influences the formation of (M2+1-xM3+x(OH)2(An-)x/n·mH2O, LDH) of aluminum alloys were determined and the role of Mg2+ in the corrosion process, as well as the mechanism of metallic material corrosion caused by aerosols. The key factors that control aluminum alloys corrosion will be acquired.The law of material corrosion in salt lake will be understood,so that the reference for corrosion and protection in salt lake can be provided.