锌浴中镍含量对热浸锌镀层厚度的影响

Effect of Ni Content in Zn Bath on Thickness of Hot Dip Galvanized Coating

应用SEM、EPMA等方法研究了锌浴中镍含量对热浸锌镀层厚度的影响，试验结果表明：当锌浴中镍含量小于0.12% (wt)时，镀层随镍含量增加而减薄；当镍含量大于0.12%时，镀层则随镍含量增加而增厚。在热镀锌生产线上对0.10%以下的不同镍含量锌浴的应用结果表明：为了兼顾不同产品对最低镀层厚度的要求，镍含量可在0.04%～0.10%间选择，这时由于减少了镀层超厚，节锌效果明显。

The effect of Ni content in Zn bath on thickness of hot dip galvanized coating was studied using SEM. It showed that,with the Ni content increasing,the coating thickness increased when the nickel content < 0.12％， and then decreased when Ni content >0.12％ . The industrial practice showed that the Ni content can be chosen in a range of 0.04％～ 0.10％ ,which results in satisfactory coating thickness and saves zinc because of reducing the excess coating thickness.