包铝LY12铝合金表面镀铬层的界面显微组织及耐蚀性能  

INTERFACE MICROSTRUCTURE AND CORROSION RESISTANCE OF ELECTRODEPOSITED Cr COATING ON ALUMNIUM OVERLAID LY12

作　　者：张慧[1] 于志明[1] 孙伟成[2] 

机构地区：[1]中国科学院金属研究所,沈阳110016 [2]沈阳工业学院,沈阳110016

出　　处：《腐蚀科学与防护技术》2003年第6期352-355,共4页Corrosion Science and Protection Technology

摘　　要：利用电镀法在包铝LY12铝合金表面上制备约 2 0 μm厚的Cr镀层 ,通过对热处理前后镀铬试样的断面显微硬度分布的测试 ,用扫描电镜对镀铬试样的断面形貌进行观察分析以及电子探针测定镀铬试样界面处的元素线分布状态等分析了镀铬试样的界面显微组织 .同时 ,分别在 60℃、Na2 CO3(2 5g/L)和室温、NaOH(10 g/L)两种溶液中对镀铬层的耐蚀性能进行了考察 .结果表明 。A Cr coating of 20 μm can be electrodeposited on surface of Al overlaid YL12.Microhardness distribution across the Cr coating and substrate was measured.Cross-sectional micrographs were observed and analyzed by SEM.The element distribution across the Cr coating and substrate was inspected by EPMA.In addition,corrosion resistance of the alloy without and with Cr coating was assessed in solutions of Na 2CO 3 of 25 g/L at 60℃,and NaOH of 10 g/L at room temperature.The results show that the corrosion resistance of Cr coated alloy in the two corrosive medium was excellent.

关 键 词：包铝LY12铝合金 镀铬 显微组织 耐蚀性 热处理 扫描电镜 

分 类 号：TQ153.11[化学工程—电化学工业]