锡、镍对高硅钢表面热浸镀锌层生长的影响  

Effects of tin and nickel on growth of hot-dip galvanized coating on high-silicon steel surface

作　　者：孔纲[1] 王世卫[1] 车淳山[1] 卢锦堂[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《电镀与涂饰》2012年第2期23-26,共4页Electroplating & Finishing

摘　　要：研究了Zn-Sn和Zn-Sn-Ni浴中高硅钢(含Si0.36%)表面镀锌层的生长和微观组织变化,探讨了Sn和Ni抑制高硅钢镀层快速生长的原因。结果表明,含Sn锌浴能抑制高硅钢表面镀锌层的快速生长,抑制效果随锌浴中Sn含量的增加而增强。当锌浴中的Sn含量达5%时,高硅钢镀锌层的生长方式发生了改变,由反应扩散控制变为扩散控制。高硅钢在Zn-Sn或Zn-Sn-Ni浴中镀锌时,镀锌层的ζ/η界面形成了Sn或Sn和Ni富集区,在一定程度上阻滞了Fe-Zn扩散。锌浴中添加微量的Ni能显著减少Sn用量,当锌浴中Ni的添加量为0.06%时,Sn的用量可从3%降到1.5%。The growth and microstructure changes of hot-dip galvanized coating on the surface of high-silicon （0.36% Si） steel were studied in Zn-Sn and Zn-Sn-Ni baths, respectively. The reason why Sn and Ni in zinc bath can inhibit the rapid growth of coating on high-silicon steel was discussed. The results showed that Sn in zinc bath can decrease the rapid growth of zinc coating on surface of high-silicon steel, and the inhibiting effect is reinforced with increasing Sn content in zinc bath. The growth mechanism of coating changes from reaction diffusion control to diffusion control when the Sn content in zinc bath is up to 5%. The Sn-rich or Sn and Ni-rich zone is formed at the interface of ζ/η in the galvanized coating obtained from Zn-Sn or Zn-Sn-Ni bath, suppressing Fe-Zn interdiffusion to some extent. The amount of Sn added can be remarkably reduced by adding a tiny amount of Ni to zinc bath, which is reduced from 3% to 1.5% by 0.06% Ni addition to the zinc bath.

关 键 词：高硅钢 热浸镀锌 铁锌金属间化合物 镍 锡 生长 

分 类 号：TG174.443[金属学及工艺—金属表面处理]