AZ91D镁合金化学镀Ni-P/Ni-W-P双层镀层研究  

Electroless Ni-P/Ni-W-P coatings on AZ91D magnesium alloy

作　　者：李光玉[1,2] 程仲基[1,2] 牛丽媛[1,2] 连建设[1,2] 

机构地区：[1]吉林大学汽车材料教育部重点试验室,长春130022 [2]吉林大学材料科学与工程学院,长春130022

出　　处：《材料科学与工艺》2009年第4期527-530,共4页Materials Science and Technology

基　　金：国家重点基础研究发展计划项目(2004CB619301);吉林省科技支撑重点项目(31008K142416)

摘　　要：为了提高镁合金的耐磨耐蚀性,研究了一种镁合金直接化学镀Ni-P/Ni-W-P双层镀层的方法.采用扫描电镜(SEM)和X-射线衍分析射仪(XRD)分析了镀层的微观结构.对镀层进行了极化曲线分析,并进行了盐酸腐蚀试验和结合力试验.结果表明,该复合镀层组织致密无孔,具有较高的显微硬度和高耐蚀性.镀层硬度可达622HKV,试样在10%的HCl溶液中可保持近3h不腐蚀基体,对镁合金起到很好的保护作用.In order to enhance the corrosion resistance and wear-resistance of magnesium alloy, an available method to deposit electroless Ni -P/Ni -W- P coatings on AZ91D magnesium alloy was discussed. The micro- structure of the coatings was analyzed by scanning electron microscope （SEM） and X-ray diffraetmeter （XRD）. The corrosion resistance of the coatings was estimated by electrochemical polarization measurements and 10% HCl solution immergence test. Results show that the complex coatings on AZ91D magnesium alloy can stand in 10% HCl solution for 3 h without corrosion, and the hardness of coatings can reach 622 HKV, which exhibits good adhesions. Therefore the coatings can offer reliable protection for AZ91D magnesium alloy.

关 键 词：镁合金 化学镀 Ni—W—P AZ91D 耐蚀性 

分 类 号：TQ153.2[化学工程—电化学工业]