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研究镀锌钢丝表面不同甲醇比例和纳米CeO_2颗粒改性的镀锌钢丝的电化学性能。采用交流阻抗谱分析硅烷水解和纳米CeO_2颗粒的添加对钝化膜耐腐蚀性的影响。利用等效电路拟合模型探讨在3.5wt%NaCl溶液中浸泡不同时间钝化膜的耐蚀性变化。使用扫描电镜观察钝化膜的组织。结果表明:甲醇浓度对硅烷水解有重要作用,但单纯纳米CeO_2颗粒的添加对钝化膜的耐蚀性影响不大。
Electrochemical properties of galvanized steel wire with different proportions of methanol and nano-CeO 2 particles on galvanized steel wire were studied. The influence of silane hydrolysis and nano-CeO 2 particles on corrosion resistance of passivation film was analyzed by AC impedance spectroscopy. Equivalent circuit fitting model was used to investigate the corrosion resistance of the passive film immersed in 3.5wt% NaCl solution at different times. The structure of the passive film was observed using a scanning electron microscope. The results show that methanol concentration plays an important role in the hydrolysis of silane. However, the addition of simple nano-CeO 2 particles has little effect on the corrosion resistance of passivation film.