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将Q235钢在450℃的Zn-Ni-Ti合金中热浸镀0.5~5 min,研究了锌池中添加0.03%~0.06%Ni和0.02%~0.04%Ti对含硅结构钢热浸镀锌层组织的影响。并通过电化学方法测试了Zn-Ni-Ti合金及其镀层在10%Na Cl溶液中的耐蚀性。研究发现,锌池中同时添加0.03%~0.05%Ni和0.02%~0.03%Ti可有效抑制Q235钢热浸镀锌时的硅反应性,合金层厚度明显减薄,其生长主要受扩散控制。而且不会形成大量的三元化合物渣滓。实验证实,添加微量Ni和Ti后,提高了锌合金及其镀层的耐蚀性。但当添加0.05%Ni+0.04%Ti时,镀层表面质量下降,还会形成较多的溶解了约1.0%Ni的Zn-Fe-Ti三元化合物。
The Q235 steel was hot-dipped in Zn-Ni-Ti alloy at 450 ℃ for 0.5-5 min. The effects of addition of 0.03% -0.06% Ni and 0.02% -0.04% Ti on the hot- The impact of layer organization. The corrosion resistance of Zn-Ni-Ti alloy and its coating in 10% NaCl solution was tested by electrochemical method. The results show that addition of 0.03% ~ 0.05% Ni and 0.02% ~ 0.03% Ti in the zinc bath can effectively inhibit the reactivity of Q235 steel during hot-dip galvanizing. The thickness of the alloy layer is obviously thinned and its growth is mainly controlled by diffusion. And does not form a large amount of ternary compound dross. Experiments confirmed that adding a small amount of Ni and Ti, improve the corrosion resistance of zinc alloy and its coating. However, when 0.05% Ni + 0.04% Ti was added, the surface quality of the coating decreased, and more Zn-Fe-Ti ternary compounds with about 1.0% Ni dissolved were formed.