【摘要】 制备了Ａｌ－Ｌｉ合金中的金属间相δ（Ａｌ－Ｌｉ）、Ｔ１（Ａｌ２ＣｕＬｉ）、Ｔ２（Ａｌ６ＣｕＬｉ３）、Ｓ＇（Ａｌ２ＭｇＣｕ）、Ｔ（Ａｌ２ＭｇＬｉ），在３．５％ＮａＣｌ溶液中测试了这些相的自腐蚀电位和动态极化行为．结果表明：Ｔ１、Ｔ２、Ｔ相存在钝化现象，Ｓ＇相则没有；这些金属间相的腐蚀倾向以Ｔ２、Ｔ１、Ｓ＇、Ｔ、δ的顺序增大，腐蚀速度以Ｔ２、Ｔ、Ｓ＇、Ｔ１、δ的顺序增大；在８０９０Ａｌ－Ｌｉ合金中这些相都作为阳极相优先发生腐蚀，Ｔ２、Ｔ１相的耐蚀性好于其它相；控制合金中金属间相的尺寸、数量和分布可以改善Ａｌ－Ｌｉ合金的耐蚀性．更多还原

【Abstract】 Some intermetallic phases in Al Li alloy were prepared, and their free corrosion potential and potentiodynamic polarization behaviors in 3.5% NaCl solution were investigated. Experimental results showed that, the corrosion susceptibilities of these phases increased in the sequence of T 2、T 1、S’、T、δ, while the corrosion rates increased in the sequence of T 2、T、S’、T 1、δ. All these phases would act as anodes in the corrosion processes of 8090 Al Li alloys under heat treatment conditions, T 2 and T 1 showed better than the others. Corrosion resistance of Al Li alloy might be improved by controlling the sizes, contents and distributions of these intermetallic phases.更多还原