磷含量对化学镀钯层性能的影响  

Effect of phosphorus content of electrolessly plated palladium coating on its properties

作　　者：郑沛峰 胡光辉[1] 周仲鑫 路培培 潘湛昌[1] 张波 ZHENG Peifeng;HU Guanghui;ZHOU Zhongxin;LU Peipei;PAN Zhanchang;ZHANG Bo(School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China;Guangdong Lear Chemicals Limited,Guangzhou 511475,China)

机构地区：[1]广东工业大学轻工化工学院,广东广州510006 [2]广东利尔化学有限公司,广东广州511475

出　　处：《电镀与涂饰》2023年第11期1-6,共6页Electroplating & Finishing

摘　　要：通过改变化学镀钯液中次磷酸钠的质量浓度,制备了P质量分数分别为4.64%、5.05%、5.71%和6.70%的Pd镀层。采用扫描电镜、能谱仪、X射线衍射仪及电化学工作站分析了P含量对Pd镀层表面形貌、耐蚀性、晶态结构及可焊性的影响。结果表明:随着镀液中次磷酸钠质量浓度的增大,镀层的P质量分数增大,Pd镀层的表面微观形貌和耐蚀性均先改善后变差。当P质量分数为5.71%(即镀液中次磷酸钠的质量浓度为5 g/L)时,Pd镀层的表面形貌和耐蚀性均最佳。所得Pd镀层都是非晶态结构,并且可焊性良好。Pd coatings with different mass fractions(i.e.4.64%,5.05%,5.71%,and 6.70%)of phosphorus were obtained by varying the mass concentration of sodium hypophosphite in an electroless palladium plating bath.The effect of P content of Pd coating on its surface morphology,corrosion resistance,crystal structure,and solderability were studied by scanning electron microscopy,energy-dispersive spectroscopy,X-ray diffraction,and electrochemical measurement.The results showed that the mass fraction of phosphorus in coating was increased with the increasing of mass concentration of sodium hypophosphite in plating bath,making the micromorphology and corrosion resistance of Pd coating better initially and then worse.The Pd coating containing 5.71%of phosphorus which was plated from the bath containing 5 g/L of sodium hypophosphite had the best surface morphology and corrosion resistance.All of the Pd coatings obtained were amorphous with excellent solderability.

关 键 词：化学镀钯 次磷酸钠 磷含量 微观结构 耐蚀性 可焊性 

分 类 号：TQ153.19[化学工程—电化学工业]