无铬封闭处理对ZL101A铝合金阳极氧化膜耐蚀性能的影响  

Effect of Chromium-Free Sealing Treatment on Corrosion Resistance of Anodic Oxide Films on ZL101AAluminum Alloy

作　　者：骆骢 马硕 LUO Cong;MA Shuo(Traffic Institute,Bortala Polytechnic,Bole 833400,China;Hubei Key Laboratory of Modern Automobile Components Technology,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]博尔塔拉职业技术学院交通学院,新疆博乐833400 [2]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070

出　　处：《电镀与精饰》2022年第2期46-50,共5页Plating & Finishing

基　　金：2013新疆维吾尔自治区教育厅课题(新教职成18号)。

摘　　要：对汽车用ZL101A铝合金进行阳极氧化,并分别采用热水封闭、钴盐封闭、锆盐封闭和铈盐封闭等无铬封闭工艺对阳极氧化膜进行封闭处理。表征了封闭前后阳极氧化膜的形貌,并测试分析了封闭前后阳极氧化膜的厚度和耐蚀性能。结果表明:与未封闭阳极氧化膜相比,封闭处理后阳极氧化膜的孔隙率降低,表面平整度和致密性改善,耐蚀性能有不同程度提高,但厚度变化不大。铈盐封闭阳极氧化膜表面平整度和致密性最好,粗糙度为0.216μm,电荷转移电阻达到1.93×10^(5)Ω·cm^(2),腐蚀质量损失为1.79 g/m^(2),其耐蚀性能优于热水封闭、钴盐封闭和锆盐封闭阳极氧化膜。铈盐封闭是效果最好的无铬封闭工艺。Anodic oxidation of ZL101A aluminum alloy for automobile was carried out,and the anodic oxidation film was sealed by chrome-free sealing process of hot water sealing,cobalt sealing,zirconium sealing and cerium salt sealing,respectively.The morphology of the anodic oxide films before and after sealing was characterized,and the thickness and corrosion resistance of the anodic oxide films before and after sealing were tested and analyzed.The results showed that compared with the unsealed anodic oxide film,the porosity of the anodic oxide film after sealing treatment was decreased,the surface roughness and compactness were improved,and the corrosion resistance was improved to different degrees,but the thickness was almost unchanged.The surface roughness and densification of the anodic oxide film sealed with cerium salt was 0.216μm,the charge transfer resistance reached 1.93×10^(5)Ω·cm^(2) and the corrosion loss was 1.79 g/m^(2).The corrosion resistance of the anodic oxide film sealed with cerium salt was better than that of the anodic oxide films sealed with hot water,cobalt salt and zirconium salt.Cerium salt sealing was the best chrome-free sealing process.

关 键 词：ZL101A铝合金 阳极氧化膜 耐蚀性能 钴盐封闭 锆盐封闭 铈盐封闭 

分 类 号：TQ153.6[化学工程—电化学工业]