稀土对Al、Zn及其合金11年大气腐蚀的影响

Effects of RE on 11 Year Atmosphere Corrosion of Al,Zn and their Alloys

本文就Ａｌ、Ｚｎ 及其稀土合金和Ｆｅ等１２ 种试样进行了长达１１ 年的大气腐蚀试验。结果表明，Ａｌ、Ｚｎ及其合金中添加适量稀土可以不同程度提高其耐蚀性。特别是Ａｌ、Ｚｎ 合金中加入稀土后提高耐蚀性明显，Ａｌ－４３．４％ Ｚｎ－１．６％ Ｓｉ及Ｚｎ－５％ Ａｌ合金中加入０．１％ ＲＥ耐蚀性分别提高０．５ 倍和１．０５ 倍。稀土的适宜加入量小于０．５％ 。

Experiments of 12 types of samples,which are Al,Zn and their alloys and Fe etc.,have been made in atmosphere corrosion for 11 years.The results show that corrosion resisting property of Al, Zn and their alloys can be improved differently by adding suitable amount of RE metals into them.Particularly,corrosion resisting property of Al base and Zn base alloys can increase significantly.After being added into 0 1% RE metals,the corosion resistances of Al 43 4%Zn 1 6%Si and Zn 5%Al are 0 5 and 1 05 times as higher as those of their original samples separately.The optimum amount of RE metals is less than 0 5% .