压铸镁合金AZ91表面化学镀Ni-P合金研究  

Study on surface plating Ni-P of die-casting AZ91 magnesium alloy

作　　者：孙雅茹[1] 李灿权[1] 刘正[1] 吴狄[2] 

机构地区：[1]沈阳工业大学理学院,沈阳110023 [2]沈阳工程学院,沈阳110036

出　　处：《沈阳工业大学学报》2005年第5期596-599,共4页Journal of Shenyang University of Technology

摘　　要：研究了压铸镁合金AZ91的表面化学镀镍磷合金的工艺,利用X射线衍射(XRD)、扫描电镜(SEM)、能谱(XPS)及极化曲线的测量等方法,探讨了镁合金表面化学镀Ni-P层的组织、相、成分及其耐蚀性,结果显示,镁合金化学镀Ni-P合金镀层在350℃热处理后成晶态,镀层成分为NiP、Ni2P等.化学镀Ni-P合金镀层在3.5%NaCl中的极化曲线存在明显的钝化区,且钝化区呈直线均匀,耐蚀性较好.Surface plating Ni-P technology of die-casting AZ91 magnesiu alloys was investigated. By means of XRD, SEM and polarization curve analysis on surface structure phase, chemical composition and corrosion resistance, it is indicated that chemieal plating Ni-P layer mainly contain Ni and P, and its structure was non-crystal. After heat treatment at 350℃, it has become erystal from non-crystal. Polarization curves show that the Ni-P plating layer has long passivation district and better corrosion resistance in the 3.5 % NaCl solution.

关 键 词：镁合金 表面处理 极化曲线 耐蚀性 镀层 钝化 化学镀 

分 类 号：TG175[金属学及工艺—金属表面处理]