等离子处理TiO_2纳米粉末对Zn-TiO_2复合镀的影响

Effects of plasma treated TiO_2 nanoparticles on Zn-TiO_2 composite coating

为了提高复合电镀层中非金属颗粒的含量,制备出硬度高、耐磨性好的复合镀层。以N2等离子处理纳米TiO2,然后加入电镀锌液中以Zn-TiO2复合电镀为研究对象。研究了电镀的电流效率、镀层硬度以及镀层耐磨性,通过研究得到,等离子处理的TiO2制备的Zn-TiO2复合镀层比未等离子处理TiO2制备的复合镀层显微硬度由165Hv提高到180Hv,耐磨系数由0.75提高到0.9。等离子处理的TiO2在电镀过程中可以提高电镀的电流效率36%以上。

In order to raise the content of the nonmetallic particles in composite plating,high hardness and good wear resistance composite coating was prepared.Nano TiO2 was processed in N2 plasma,then added to the elec-tricity galvanized liquid Zn- TiO2 composite electroplating.This paper studies the current efficiency,coating hardness and plating coating wear resistance.From the research：when nano TiO2 was processed in N2 plasma, the microhardness of Zn-TiO2 composite coating increased from 165 to 180Hv,and the wear-resisting coefficient of Zn-TiO2 composite coating increased from 0.75 to 0.9.Adding the plasma treatmented TiO2 can improve more than 3 6% the current efficiency in the electroplating process than without plasma treatment.