电刷镀制备Ni-TiO2纳米复合镀层微观结构及其腐蚀电化学行为

Ni-TiO2 nanocomposite coatings with various contents of TiO2 nanoparticles and surfactants were prepared on Q235 low carbon steel by electro-brush plating. In order to obtain the performance excellent of coating, in this article the influence of different surfactants and various contents of TiO2 nanoparticles in plating bath were investigated. The surface microstructure of composite coatings was studied by using SEM. The corrosion electrochemical behavior of Ni-TiO2 nanocomposite coating in 3.5%NaCl solution was studied by polarization curve. The results showed 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 10g/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.