Ni-TiO2基纳米复合电刷镀层微观结构及腐蚀电化学行为

研究了用电刷镀在Q235钢上制备出Ni-TiO2纳米复合镀层复合镀液中,纳米颗粒的加入量及不同的表面活性剂对镀层性能的影响。采用SEM对复合镀层的表面形貌进行分析,用极化曲线研究了纳米复合镀层在NaCl溶液中的腐蚀电化学行为,结果表明:与纯Ni镀层相比,Ni-TiO2纳米复合镀层晶粒更加细小,空隙率更低,阳离子表面活性剂分散镀液所得镀层效果最为显著;复合镀液中纳米TiO2质量浓度为10g/L时,复合镀层的耐腐蚀性能最优;纳米颗粒含量相等的情况下,阳离子表面活性剂分散镀液所得镀层具有最好的耐腐蚀性能。

Microstructure and Corrosion Electrochemical Behavior of Ni-TiO2 Nanocomposite Coating Prepared by Electro-brush Plating

It mainly investigated the impact of various contents of TiO2 nanoparticles and different surfactants in nanocomposite plating bath on the performance of Ni-TiO2 nanocomposite coating,which were prepared on Q235 low carbon steel by electro-brush plating.The surface microstructure of composite coatings was studied by SEM.The corrosion electrochemical behavior of Ni-TiO2 nanocomposite coating in NaCl solution was studied by polarization curve.The results show that Ni-TiO2 nanocomposite coatings have smaller grain and lower porosity compared to pure Ni coating.The best coating was made by cationic surfactant to disperse bath.While TiO2 nanoparticle content was 10 g/L in plating bath,the coating had the best corrosion resistance.And the coating had the best corrosion resistance by cationic surfactant to disperse bath while plating bath have the same TiO2 nanoparticle content.