Study on Atmospheric Corrosion of 7B04 Aluminum Alloy in Seashore Area
Outdoor exposure tests for atmospheric corrosion of 7B04 aluminum alloy are carried out in Qingdao and Hainan. Corroded samples are investigated by mass loss, SEM, electrochemical impedance spectroscopy (EIS) methods. The results show that in the initial stage pitting corrosion emerges on the surface of 7B04 aluminum alloy in Qingdao and Hainan, and general corrosion occurs later. Both the corrosion rates in Qingdao and Hainan change from high to low, and the mass losses follow w=atb (b<1), but the corrosion rate of 7B04 aluminum alloy in Hainan is faster than that in Qingdao. The electrochemical impedance spectroscopy (EIS) reveals that when corrosion product is adequately thick, the electrode process of atmospheric corrosion in marine is controlled by diffusion of corrosive ions from corrosion product layer to the metal/oxide film interface.
7B04 aluminum alloy atmospheric corrosion electrochemical impedance spectroscopy pitting corrosion general corrosion
Liu Ming Cai Jianping Zhang Xiaoyun Sun Zhihua Lu Feng
Corrosion and Protection Laboratory,Beijing Institute of Aeronautical Materials, Beijing 100095, China
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
942-945
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）