稀土对热浸渗铝组织和耐腐蚀性影响的研究  

The Influence of Rare Earth on the Microstructure and Corrosion-resistance of Hot-dipped Aluminum

作　　者：文九巴[1] 李全安[1] 张荥渊[1] 刘振宝[1] 

机构地区：[1]洛阳工学院材料科学与工程系,河南洛阳471039

出　　处：《材料热处理学报》2002年第3期69-71,共3页Transactions of Materials and Heat Treatment

基　　金：河南省高校杰出科研人才创新工程项目资助( 2 0 0 1kycx0 0 9);河南省自然科学基金资助 ( 1110 4 0 30 0 )

摘　　要：对稀土 -铝合金热浸镀渗工艺和渗铝层组织及耐腐蚀性进行的研究结果表明 ,在 0 1 %～0 5w %RE含量范围内 ,随着稀土含量的增加 ,渗层组织不断细化 ,渗层前沿整齐。稀土含量超过0 5w %后组织反而粗化。无论渗层是否经过扩散处理 ,稀土含量为 0 3w %时 ,渗层耐蚀性能最好。稀土含量为 0 3w %时 ,扩散前耐蚀性是不加稀土的 1 3倍 ,扩散后其耐蚀性是不加稀土时的约 3倍。The influence of rare earth on the microstructure and corrosion\|resistance of hot\|dipped aluminum was studied. The results show that the microstruture is fined and homogenized, the forehead edge of hot\|dipped layer become smooth with the increase of the rare earth content in the range of 0 1%～0 5 w %, but the microstructure begins obvious deterioration when the content is more that 0 5 w %. The hot\|dipped layer with 0 33 w % rare earth possesses best corrosion\|resistance. The corrosion resistance of the hot\|dipped layer with 0 3% rare earth is 1.3 time as much as that without rare earth before diffusion and 3 times after diffusion.

关 键 词：稀土 铝合金 渗铝 耐蚀性 

分 类 号：TG174.443[金属学及工艺—金属表面处理]