铝合金稀土盐钝化工艺研究  

Investigation on Rare Earth Salt Passivation Technology for Aluminum Alloy

作　　者：王春霞[1] 周雅[1] 曹经倩[1] 邵志松[1] 

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《电镀与精饰》2010年第10期31-33,37,共4页Plating & Finishing

摘　　要：传统的铝合金铬酸盐钝化工艺对人体和环境有毒副作用,研究了一种以Ce(NO3)3·4H2O为主盐,KMnO4为氧化剂,Sr(NO3)2·4H2O为促进剂的环保型稀土盐钝化工艺;并通过正交试验优化了钝化液配方和工艺参数。结果表明:在10g/LCe(NO3)3·4H2O、2g/LKMnO4、0.6g/LSr(NO3)2·4H2O,室温条件下可以在铝合金表面形成金黄色的钝化膜,该钝化膜168h中性盐雾试验耐蚀等级为8级。In order to seek a substitute for the traditional passivation process using hazardous chromate,an environment friendly passivation technology with Ce（NO3） 2 ·4H2O as main salt,KMnO4 as oxidation agent and Sr（NO3） 2 ·4H2O as acceleration agent for aluminum alloy was developed.The passivation solution formulation and technological parameters were optimized using orthogonal test method.The experimental results showed that a golden passivation film on LF1 aluminum alloy surface could be obtained at passivation solution composition of 10g/L Ce（NO3） 2 ·4H2O,2g/L KMnO4 and 0.6g/L Sr（NO3）·4H2O and at operating condition of room temperature.The corrosion resistance of the passivation film in 168h neutral salt spray test was ranked grade 8.

关 键 词：铝合金 稀土盐钝化 工艺 耐蚀性 

分 类 号：TQ174.45[化学工程—陶瓷工业]