2A97 Al-Li合金薄板时效析出与电位及晶间腐蚀的相关性研究

蔡超,李煬,李劲风,张昭,张鉴清

Correlation Between Ageing Precipitation, Potential and Intergranular Corrosion of 2A97 Al-Li Alloy Sheet

Chao CAI,Yang LI,Jinfeng LI,Zhao ZHANG,Jianqing ZHANG

表2 A97Al-Li合金T8时效不同时间并腐蚀后腐蚀类型和最大腐蚀深度

Table 2 Corrosion type and maximum corrosion depth of 2A97 Al-Li alloy with T8 ageing after corrosion test for different time

Time / h Dominating corrosion mode Max. IGC depth / μm Max. pitting depth / μm 0 Pitting - 125 1 Pitting and local IGC 60 122 2 Pitting and local IGC 90 120 4 Pitting with local IGC 115 125 10 Pitting - 98 22 Pitting - 107 28 Pitting - 100 36 Pitting - 107 48 Pitting - 127 60 Pitting - 110 72 Pitting - 140 120 Pitting - 100