研究静载荷对LY12CZ铝合金在3%NaCl水溶液中点蚀萌生、扩展的影响.当施加载荷时,LY12CZ合金的环状阳极极化曲线中的点蚀电位和保护电位都有一定程度的负移,表明外加载荷增大了点蚀敏感性,缩短了点蚀萌生期.在点蚀扩展阶段,点蚀的深度扩展与腐蚀时间之间符合幂函数的规律,与外加应力之间符合指数函数的关系. The effect of static load on the initiation and propagation of pitting corrosion of LY12CZ aluminum alloy in 3% NaCl aqueous solution was studied.When the load was applied, the pitting potential and the protective potential in the cyclic anodic polarization curve of LY12CZ alloy all had a certain degree of negative shift , Which indicates that the applied load increases the pitting sensitivity and shortens the initiation period of pitting corrosion.At the period of pitting corrosion expansion, the relationship between the depth expansion of pitting and the corrosion time accords with the law of power function and exponential function relationship.