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在3种不同的钝化液体系中对屋面避雷针镀锌层进行了表面改性处理,研究了硅酸钠溶液、甲基硅酸钠溶液和5%硅酸钠+2%甲基硅酸钠复合钝化液对表面膜层组织和耐腐蚀性能的影响。结果表明,经过复合改性处理后的避雷针表面膜层既没有出现镀锌层和硅酸钠溶液改性层中的褶皱现象,也没有出现甲基硅酸钠溶液改性后的疏松多孔结构,且整个表面改性膜层非常平整、致密和均匀;经过5%硅酸钠+2%甲基硅酸钠复合钝化液改性后的膜层的耐盐雾腐蚀和电化学腐蚀性能最好。
The surface modification of roofing lightning rod zinc coating was carried out in 3 different passivating systems. The effects of sodium silicate solution, sodium methylsilicate solution and 5% sodium silicate + 2% sodium methylsilicate Effect of Composite Passivation Solution on Microstructure and Corrosion Resistance of Surface Coatings. The results show that the surface layer of the lightning rod after the composite modification has neither the wrinkles in the modified layer of the zinc coating or the sodium silicate solution nor the loose porous structure modified by the sodium methylsilicate solution, And the whole surface modified film is very smooth, dense and uniform; after 5% sodium silicate + 2% sodium silicate composite passivation solution modified film salt spray corrosion and electrochemical corrosion best .