Ni-TiO_2基纳米复合电刷镀层微观结构及腐蚀电化学行为  

Microstructure and Corrosion Electrochemical Behavior of Ni-TiO_2 Nanocomposite Coating Prepared by Electro-brush Plating

作　　者：王芹芹[1] 沈承金[1] 朱振[1] 周仕勇[1] 

机构地区：[1]中国矿业大学材料科学与工程学院,徐州221008

出　　处：《表面技术》2012年第1期13-16,共4页Surface Technology

摘　　要：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。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 NaC1 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 TiO2nanoparticle content.

关 键 词：纳米复合镀层 Ni—TiO2 电刷镀 表面活性剂 极化曲线 

分 类 号：TQ153.2[化学工程—电化学工业] TG178[金属学及工艺—金属表面处理]