电镀条件对非晶态Pd-Ni-P镀层组成和形貌的影响  

Effects of Electroplating Parameters on the Composition and Morphology of Pd-Ni-P Amorphous Films

作　　者：楼莹[1] 岑树琼[1] 周颖华[1] 牛振江[1] 李则林[1] 

机构地区：[1]浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室,浙江金华321004

出　　处：《材料保护》2008年第4期10-13,共4页Materials Protection

基　　金：浙江省自然科学基金(Y404028)

摘　　要：采用电沉积法制备了Pd-Ni-P合金,采用扫描电子显微镜(SEM)、能量色散谱(EDX)、X射线衍射(XRD)等方法对镀层的形貌、成分和结构进行了分析,研究了PdCl2、NiSO4·6H2O主盐浓度、电流密度等电镀条件对其形貌、组成及性能的影响。结果表明,通过控制主盐浓度和电流密度,可以获得不同成分的Pd-Ni-P合金镀层。Pd-Ni-P合金镀层的结构为非晶态结构或微晶结构,在300℃下热处理1h后,非晶态镀层有少量Ni3P相析出,但仍基本保持非晶态。350℃下热处理1h后,镀层发生晶化,主要析出Ni3P、Ni2Pd2P相。在3%NaCl溶液中,Pd-Ni-P合金镀层的耐腐蚀性能优于Ni-P镀层,耐腐蚀性能随Pd含量增加而增强。Amorphous Pd-Ni-P alloy films were electrodeposited.The morphology,composition and structure of the resulting Pd-Ni-P alloy coating were analyzed by means of scanning electron microscopy(SEM),energy dispersive X-ray analysis(EDX)and X-ray diffraction(XRD).The effects of current density and concentration of main salts on the component,surface morphology and corrosion resistance of the alloy coating were investigated.The results showed that it was feasible to prepare Pd-Ni-P alloy coatings with different compositions by properly adjusting the concentration of the main salts and current densities.The as-prepared Pd-Ni-P alloy coatings have amorphous structure or microcrystalline structure.The Pd-Ni-P alloy coating kept the amorphous structure almost unchanged after being heated at 300 ℃ for 1 h,while it was crystallized to form Ni3 P and Ni2 Pd2 P phases after being heated at 350 ℃ for 1 h.Moreover,the electroplated Pd-Ni-P alloy coating showed better corrosion resistance in 3% NaCl solution than Ni-P alloy coating.

关 键 词：Pd—Ni—P合金 电沉积 形貌 耐蚀性能 非晶态 

分 类 号：TQ153.1[化学工程—电化学工业]