In this work, the effect of the corrosion testing methodology on the degradation of anodized and post-treated AA-2024T3 specimens is considered. Two post-treatments are selected for the anodized layers, namely hydrothermal sealing and cerium-based post treatment. The two post-treatments are selected such that in one case corrosion protection mainly arises from a barrier effect (hydrothermal sealing) and in the other it arises from active inhibition (cerium-based treatment). It is found that salt spray and immersion testing provide similar results for the hydrothermally sealed oxides, but differ substantially for the cerium-treated oxides. The discrepancy is due to the fact that the continuously refreshing electrolyte layer during salt-spray testing promotes film dissolution and hinders precipitation of aluminium hydroxide and cerium compounds, unlike in stagnant bulk electrolyte. Hence, salt-spray testing is likely to be more aggressive than immersion testing for those systems that rely on active inhibition.

在这项工作中，考虑了腐蚀测试方法对阳极氧化和后处理的AA-2024T3标本降解的影响。为阳极氧化层选择两种后处理，即水热密封和基于铈的后处理。选择这两种后处理，使得在一种情况下，腐蚀保护主要来自于屏障作用（水热密封），而在另一种情况下，其腐蚀源自于主动抑制作用（基于铈的处理）。已经发现，盐雾和浸入测试对于水热密封氧化物提供了相似的结果，但是对于铈处理过的氧化物则有很大的不同。差异是由于以下事实：盐雾测试过程中不断刷新的电解质层会促进薄膜溶解并阻碍氢氧化铝和铈化合物的沉淀，不同于停滞的本体电解质。因此，对于那些依赖主动抑制的系统，盐雾测试可能比浸入测试更具侵略性。