Abstract The time dependent susceptibility of AA2198-T851 Al-Cu-Li alloy to severe localized corrosion in 0.01 mol L−1 NaCl solution has been investigated by immersion and SVET tests. The results reveal that the propagation of severe localized corrosion, in the alloy, is crystallographic and it is associated with the slip bands in the individual grains of the alloy. The slip bands caused uneven precipitation of the active T1 particles. Also, oscillations in SVET current density values associated with deposition and detachment of corrosion products were observed. Furthermore, the intensity of corrosion activities increased over time for open or partially covered pits.

中文翻译：

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AA2198-T851合金严重局部腐蚀敏感性研究

摘要 通过浸泡和 SVET 试验研究了 AA2198-T851 铝铜锂合金在 0.01 mol L-1 NaCl 溶液中对严重局部腐蚀的敏感性。结果表明，合金中严重局部腐蚀的传播是结晶学的，并且与合金单个晶粒中的滑移带有关。滑移带导致活性 T1 颗粒的不均匀沉淀。此外，观察到与腐蚀产物的沉积和分离相关的 SVET 电流密度值的振荡。此外，对于开放或部分覆盖的坑，腐蚀活动的强度随着时间的推移而增加。