添加Ni及Al元素改善热镀锌件表面质量及耐蚀性的研究.pdfVIP

郝建民等 　添加 Ni 及 Al 元素改善热镀锌件表面质量及耐蚀性的研究 添加Ni 及Al 元素改善热镀锌件表面质量及耐蚀性的研究 郝建民 ,陈宏 ,张荣军 (长安大学工程机械学院 ,陕西 西安710064) 　　[摘要] 　针对钢材热镀锌过程中 ,当基体中硅含量大于 0. 05 %时出现圣德林效应 ,通过在镀液中添加 Ni 、Al 元素 ,解 决了镀层超厚、表面发灰、粗糙以及出现漏镀点等问题。对合金元素在镀锌过程中的作用进行分析。并采用中性 NaCl 盐 雾试验研究镀层的耐蚀性。结果表明 :Al 的加入可以使镀层表面光亮;加入适量的 Ni 能抑制镀层超厚 ,消除圣德林效应 ; 添加 Ni 、Al 元素除了提高镀层外观质量 ,还使镀层的耐蚀性大幅度提高。 [ 关键词] 　热镀锌 ;圣德林效应 ;Fe - Zn 合金 ;耐蚀性 ( ) [ 中图分类号]TQ153 　 　 　 [文献标识码]A 　 　 　 [文章编号]1001 - 3660 2004 02 - 0038 - 02 Research on Improving Surface Qualities and Erosion Resistance of the Hot - galvanized Materials with the Additions of Ni and Al HAO J ian - min , CHEN Hong , ZHANG Rong - jun (Mechanical Engineering College , Chang’an University , Xi ’an , 710064 , China) [ Abstract ] 　The Sandelin effects occur when the contents of silicon in the base metal are above 0. 05 percent in the hot galvanizing process. The extra - thickness , grayness , rough and leakages of the hot - galvanized film were solved by adding Ni and Al in the galvanized solution. Moreover , we analyzed the effects of the Ni - Al alloy and studied the erosion resistance of the hot - galvanized film using neutral NaCl salt spray test. We found that the bright ness of the film can be improved with the additions of Al and the extra - thickness of the film can be depressed with adding suitable Ni. The results indicate that not only the surface of the film qualities but also the corrosion resistance of the film are increased with the additions of Ni and Al. [ Key words ] 　H