School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;
Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;
Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station,Shenyang 110016,China;
Aluminum; Atmospheric corrosion; UV illumination; Electrochemical impedance spectroscopy;