01420Al—Li合金抗蚀性的研究

Study Corrosion Resistance of 01420 Al-Li Alloy

摘要:

系统地研究了０１４２０Ａｌ－Ｌｉ合金在欠时效和峰时效两种状态下的抗蚀性，结果表明：在晶间腐蚀，剥落腐蚀，盐雾腐蚀和应力腐蚀实验中，欠时状态的抗蚀性均优于峰时效状态，合金抗蚀性的变化主要归因于Ｓ相析的数量和分布不同，随着Ｓ相析出数量的增多及由晶界分布过渡到晶界和晶内分布，合金的抗蚀性逐渐下降。

关键词:时效 抗蚀性 铝锂合金 晶间腐蚀

Abstract:

The corrosion resistances of 01420 Al-Li alloy under aged and pesk aged conditions have been studied systematically. The results show that the corrosion resistances of under aged alloy are better than those of peak aged alloy for intergranular corrosion, exfoliationcorrosion, salt spray corrosion and stress corrosion testing. The changes of corrosion resistance of alloy owe to the variations of quantity and distribution of S phase. The corrosion resistance of alloy will gradually lower with the increasment of S phase and its distribution in grain boundary.

Key words:l-Lialloy aging corrosion resistance,