快速化学镀Ni-Zn-P合金工艺及镀层性能  

Rapid Electroless Technique for Ni-Zn-P Alloy Coating and Its Properties

作　　者：王梓杰[1] 王帅星[1] 周海飞 钱洲亥 赵晴[1] 王敏[1] 葛文娜[1] 熊艳[1] 黄勇[1] 

机构地区：[1]南昌航空大学材料科学与工程学院,南昌330063 [2]浙江省电力公司电力科学研究院,杭州310014

出　　处：《表面技术》2015年第8期25-30,共6页Surface Technology

基　　金：国网浙江省电力公司科技项目(5211011306V2)~~

摘　　要：目的确定快速化学镀Ni-Zn-P合金的工艺。方法通过一系列实验,研究主盐含量、pH值、温度、时间等对镀层沉积速度及镀层锌镍比的影响,确定最优工艺条件。借助SEM,EDS,XRD及电化学方法分析镀层微观形貌、成分及耐蚀性。结果在ZnSO4·7H2O8 g/L,NiSO4·6H2O 35 g/L,NaH2PO2·H2O20 g/L,NH4Cl 50 g/L,C6H5Na3O7·2H2O 70 g/L,稳定剂1.5 mg/L,p H=9.0,温度90∽95℃的条件下,化学镀Ni-Zn-P合金沉积速度为5∽6μm/h,镀层中Zn质量分数为8%∽10%,P质量分数为6%左右,Ni质量分数为80%∽85%。Zn的存在使Ni呈现出晶态结构,在XRD谱图上2θ=45°及2θ=52°位置分别出现了Ni（111）,Ni（200）衍射峰。施镀时间不会影响镀层成分,但会影响镀层耐蚀性。施镀1.5 h时,镀层厚度约为9∽10μm,其耐蚀性略好于相同厚度的Ni-P镀层。结论 Ni-Zn-P化学镀沉积速度较快,8%∽10%的Zn使镀层中Ni呈晶态结构,且改善了镀层耐蚀性。Objective To determine a rapid electroless technique for Ni-Zn-P alloy coating. Methods The effects of the concen-tration of main salts, pH, temperature and electroless time on the deposition rate and Zn ： Ni （ wt.%） of coating were studied by a series of experiments. An optimized electroless technique for Ni-Zn-P alloy was achieved. The morphology, composition, phase structure and corrosion resistance of the coating were analyzed by SEM, EDS, XRD and EIS, respectively. Results Ni-Zn-P alloy coating was prepared on carbon steel by the electroless technique when ZnSO4 ＆#183;7H2 O, NiSO4 ＆#183;6H2 O, NaH2 PO2 ＆#183;H2 O, NH4 Cl, C6 H5 Na3 O7 ＆#183;2H2 O, stabilizing agent, pH and temperature were 8 g/L, 35 g/L, 20 g/L, 50 g/L, 70 g/L, 1. 5 mg/L, 9. 0 and＆amp;nbsp;90∽95 ℃, respectively. The deposition rate of the coating was 5∽6 μm/h. The contents of Zn, Ni and P in the coating were 8wt.% ∽10wt.%, 80wt.% ∽85wt.% and about 6wt.%, respectively. Besides, the Ni in the coating showed crystalline struc-ture in the presence of Zn. The diffraction peaks of Ni （111） and Ni （200） appeared at 2θ=45 ＆#176; and 2θ=52 ＆#176;. In addition, elec-troless time had slight influence on the coating composition, but could affect the corrosion resistance of the coating. The thickness of Ni-Zn-P alloy coating was about 9∽10 μm when the electroless time was 1. 5 h. The Ni-Zn-P coating with a thickness of 9∽10μm had better corrosion resistance than the Ni-P coating with the same thickness. Conclusion The electroless deposition rate for Ni-Zn-P coating was higher. The presence of 8wt.% ∽10wt.% Zn led to the formation of crystalline Ni in the coating, and im-proved the corrosion resistance of the coating.

关 键 词：Ni-Zn-P镀层 化学镀 镀速 成分 耐蚀性 

分 类 号：TQ153.2[化学工程—电化学工业]