碱性电镀锌镍合金的研究  

ZINC-NICKEL ALLOY ELECTROPLATING IN AN ALKALINE BATH

作　　者：鹿文珊[1] 徐天凤[1] 陈宇[1] 张昭[1] 张鉴清[1,2] 

机构地区：[1]浙江大学化学系,杭州310027 [2]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016

出　　处：《中国腐蚀与防护学报》2012年第6期443-448,454,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(50771092和21073162);嘉兴市精英引领计划;浙江省自然科学基金(Y4100206)资助

摘　　要：采用恒电流沉积方法和X射线能谱(EDS)技术,研究了碱性Zn-Ni合金的主要电沉积工艺参数对镀层组成的影响规律,获得了Ni含量稳定为(11～13)mass%的Zn-Ni合金镀层,证实了Zn-Ni合金的共沉积过程遵循异常共沉积机制。采用扫描电镜(SEM)、原子力显微镜(AFM)和X射线衍射仪(XRD)等对优化的Zn-Ni合金镀层进行了表征,发现镀层主要具有y相(NiZn_3)结构,其表面平整、致密、光亮;腐蚀测试表明Zn-Ni合金镀层具有优良的耐蚀性能。Zinc-nickel alloy coatings were electroplated from an alkaline electrolyte using direct current, the influences of principal technological parameters on the composition of zinc-nickel alloy coatings were studied using energy dispersive spectrometer （EDS）. The results show that the content of nickel in Zn-Ni deposits kept between 11% and 13% and the co-deposition of zinc and nickel behaved anomalously. The microstructure of the optimized deposition was characterized by scanning transmission electron microscope （SEM）, atomic force microscope （AFM） and X-ray diffractometer （XRD）, the results showed that the Zn-Ni deposits consisted mainly of the γ-phase（NiZn3） and the film was compact and fine-grained. Meanwhile, the Tafel plot measurements proved the coating had good corrosion resistance.

关 键 词：锌镍合金电镀碱性异常共沉积耐蚀性 

分 类 号：O646[理学—物理化学]