摘要
采用硫酸镍体系直接在微细铝粉基体上化学镀镍，最佳工艺条件为：250g／L硫酸镍，90g／L次亚磷酸钠，35g／L柠檬酸钠，9g／L柠檬酸，4g／L硫脲，镀液pH值为10．0～11．2，镀液温度80～90℃，微细铝粉粒径（13±2）μm。采用扫描电子显微镜（SEM）、X射线衍射（XRD）和化学分析方法对镀层进行了表征。结果表明，镀层晶胞外观规则，晶粒大小均匀，结合紧密，厚度适中，没有明显缺陷和空隙，化学镀覆完整。
Electroless nickel plating of aluminum powders grit size (13±2) μm was carried out in a nickel sulfate bath. The optimized plating conditions were determined, while the resulting coating was characterized by means of scanning electron microscopy, X-ray diffraction, and chemical analysis. The optimized composition of the plating bath was determined as 250 g/L nickel sulfate, 90 g/L sodium hypophosphite, 35 g/L sodium citrate, 9 g/L citric acid, 4 g/L thiourea; while the optimized pH value and temperature of the plating bath were suggested as 10.0～11.2 and 80～90 ℃, respectively. The resulting electroless Ni-P coating had moderate thickness and was well adhered to the Al powders, whose grains had regular shape and uniform size, showing no noticeable defects and voids.
出处
《材料保护》
CAS
CSCD
北大核心
2008年第6期14-16,共3页
Materials Protection
关键词
铝粉
化学镀镍
硫酸镍体系
镀层性能
aluminum powders
electroless nickel plating
nickel sulfate system
properties
