表面处理对AZ91D镁合金性能的影响  

Effect of Surface Treatment on Performance of AZ91D Magnesium Alloy

作　　者：高阳[1,2] 代明江[2] 向兴华[1] 韦春贝[2] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]广州有色金属研究院材料表面研究所,广东广州510651

出　　处：《热加工工艺》2011年第2期121-124,163,共5页Hot Working Technology

基　　金：广东省自然科学基金资助项目(9151065101000002)

摘　　要：对压铸镁合金AZ91D分别进行了无铬化学转化、喷砂、真空镀钛的表面处理,并采用SEM、EDS、XRD、中性盐雾及电化学等方法检测和评价处理后试样的表面形貌、成分、物相组成和耐蚀性。结果表明:无铬化学转化和真空镀钛都能明显提高镁合金的耐腐蚀性,喷砂处理后镁合金的硬度和粗糙度均达最高,耐蚀性反而下降。Surface treatments（including non-chromate chemical conversion,abrasive blasting,vacuum depositing Ti film） were carried out on the surface of die-casting magnesium alloy AZ91D.The surface morphology,composition,phase structure and corrosion resistance of the samples were detected and evaluated by SEM,EDS,XRD,neutral salt spray（NSS） and electrochemical method.The results show that： Cr-free chemical conversion and vacuum depositing Ti film can significantly improve the corrosion resistance of the magnesium alloy;both the hardness and the roughness are highest after blasting,but the corrosion resistance decreases.

关 键 词：镁合金 化学转化 喷砂 镀钛 性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]