机械研磨对锌合金化学镀Ni-P镀层结构及性能的影响  

Effect of mechanical attrition on microstructure and properties of electroless-plated Ni-P coatings on zinc alloy

作　　者：李亚敏[1] 王丽波[1] 刘洪军[1] 

机构地区：[1]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《材料热处理学报》2013年第3期154-159,共6页Transactions of Materials and Heat Treatment

基　　金：甘肃省自然科学基金(2007GS04799)

摘　　要：在锌合金表面化学镀Ni-P过程中,在镀液中加入玻璃球对镀层施加机械研磨作用。随后采用X射线衍射、扫描电镜、原子力显微镜、显微硬度测试、电化学工作站等方法研究了机械研磨对化学镀Ni-P镀层结构及性能的影响。结果表明:机械研磨化学镀层是非晶态的,与传统化学镀层相比P含量有所降低;镀层致密,表面平整光滑、无孔隙;机械研磨化学镀工艺提高了Ni-P镀层的硬度和耐腐蚀性;机械研磨虽然降低了化学镀反应的活化能,但宏观化学镀速降低。A mechanically assisted electroless （MAE） plating technique was applied in the process of conventional electroless （CE） Ni-P plating on a zinc alloy by stirring the plating solution containing glass balls. Then the effect of the mechanical attrition on microstructure and properties of electroless-plated Ni-P coatings was studied by means of XRD, SEM, AFM, micro- hardness test and electrochemical experiments. The results show that the amorphous structure is obtained and the content of phosphorus decreases for the MAE plated coating. And the MAE plated coating shows smooth surface morphology, pores-free and more compactness. Therefore, the hardness and corrosion resistance of the novel coatings are considerably improved compared with that of the CE-plated Ni-P coatings. In MAE plating process, the activation energy of reaction is decreased, but the deposition rate of electroless palting is decreased too.

关 键 词：机械研磨 化学镀 NI-P镀层 显微硬度 耐腐蚀性能 模具锌合金 

分 类 号：TG174[金属学及工艺—金属表面处理]