添加稀土对55%Al-Zn镀层的影响  

The effect of the addition of RE on 55% Al-Zn coating

作　　者：李华飞[1] 郑家燊[2] 俞敦义[2] 

机构地区：[1]华中科技大学能源与动力工程学院 [2]华中科技大学化学系

出　　处：《华中科技大学学报（自然科学版）》2003年第5期107-109,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

摘　　要：通过向 5 5 %Al Zn镀液中添加微量稀土制备了 5 5 %Al Zn热浸镀层钢板 ,研究了稀土对 5 5 %Al Zn镀层的组织结构和耐盐水腐蚀性能的影响 .结果表明 ,在镀液中加入适量 (w =0 .2 % )稀土可明显提高镀层质量、细化镀层组织和提高镀层耐蚀性能 ,但加入过量稀土不利于耐蚀性能的提高 .55?% Al-Zn coatings were prepared on carbon steel sheet by adding small amounts of RE into the 55?% Al-Zn hot-dip alloy bath. The effect of RE on the surface macrostructure of coated pieces and their corrosion resistance to salt water were studied. By adding appropriate (0.1～0.3?%) RE in the melted 55?% Al-Zn bath, the quality of coatings and the corrosion resistance to salt water were improved and the grains were fined. But by adding excessive RE, the improvement of corrosion resistance was impaired.

关 键 词：稀土 铝锌镀层 镀层组织 耐蚀性能 

分 类 号：TG174.443[金属学及工艺—金属表面处理]