珍珠镀镍的电镀工艺参数优化

通过正交试验确定了珍珠镀镍的最佳工艺条件，制备出了效果优良的珍珠镍镀层，提高了镀层的珠光外观和耐腐蚀性．通过金相显微镜照片和电化学技术表征（交流阻抗技术和Tafel曲线测试）对单层珍珠镀镍、单层光亮镀镍和双层珍珠镀镍（光亮镍上施镀珍珠镍）的性能进行了对比．结果表明：双层珍珠镀镍更加均匀致密；单层珍珠镍的耐腐蚀性优于双层珍珠镀镍；双层珍珠镀镍的耐腐蚀性优于单层光亮镀镍．

Technological Parameters Optiminization of Satin Nickel Electro-deposition

Satin nickel electro-deposition have been studied on the basis of plain nickel electro-deposition and bright nickel electro-deposition in this paper. The optimum operating parameters of satin nickel electro- deposition （bath temperature is 55℃, pH=4.5 and current density is 5.5 A/dm2） was ascertained through orthogonal experiments. In addition, the properties of monolayer satin nickel, bright nickel and bi-layer nickel （bright nickel with satin nickel） have been contrasted with methods of Metallurgical Microscopy and electro- chemical characterization including Electrochemical Impedance Spectroscopy （EIS） and Tafel Curve measurements. The conclusion is obtained as follows. The coating of bi-layer nickel is better-distributed and more fine-grained. But the corrosion resistance is smaller than that of monolayer satin nickel and larger than that of monolayer bright nickel.