纳米SiO_2对锌-镍合金镀层耐蚀性的影响  

Effects of Nano-SiO_2 on Corrosion Resistance of Electrodeposited Zn-Ni Alloy Coating

作　　者：项腾飞 焦亚萍[1] 梅天庆[1] 李桂麟 

机构地区：[1]南京航空航天大学材料科学与技术学院,江苏南京211106

出　　处：《电镀与精饰》2015年第2期28-32,共5页Plating & Finishing

摘　　要：在弱酸性条件下,采用超声电沉积的方法制备(Zn-Ni)-Si O2纳米复合镀层,并与锌-镍合金镀层进行对比。实验采用电镜扫描、能谱分析、极化曲线、交流阻抗测试以及醋酸加速氯化钠浸泡试验等方法,分别研究了镀层的微观形貌、各元素含量以及耐腐蚀性能。结果表明,添加纳米Si O2后(Zn-Ni)-Si O2复合镀层更加致密,镀层中镍含量减少,极化电阻增大,采用超声后效果更加明显,表现出优异的耐蚀性能。Zn-Ni nano-SiO2 composite coating was prepared under weak acid condition by ultrasonic electro-deposition, and was compared with ordinary Zn-Ni coating. Microstructure, content of each element and corrosion resistance of the coatings were studied by methods of scanning electron microscopy, energy spectrum analysis, polarization curves, electrochemical impedance spectroscopy and accelerate acetic acid sodium chloride soaking experiment. The results showed that the nano-SiO2 coating became denser, nickel content in the coating decreased and polarization resistance increased after the nano-SiO2 was added, especially, after ultrasonic stirring was applied, the above effects were more obvious, and the coating showed an excellent corrosion resistance.

关 键 词：超声 纳米SIO2 (Zn—Ni)-SiO2复合镀层 耐蚀性能 

分 类 号：TQ153.2[化学工程—电化学工业]