摘要
6063铝合金板材分别浸在硫酸电解液、硫酸与柠檬酸混合电解液以及含TiO_(2)纳米颗粒的混合酸电解液中进行阳极氧化,制备不同类型阳极氧化膜,测试并分析了不同阳极氧化膜的微观形貌、成分、物相、厚度和耐蚀性。结果表明:在混合酸电解液中添加2.5 g/L TiO_(2)纳米颗粒,获得的复合阳极氧化膜表面均匀性和致密性最好,TiO_(2)颗粒含量和厚度分别达到3.23%、16.7μm。该复合阳极氧化膜具有最高的电荷转移电阻6943Ω·cm^(2)和低频阻抗模值7618Ω·cm^(2),表现出优异的耐蚀性。在添加2.5 g/L TiO_(2)纳米颗粒的混合酸电解液中阳极氧化后锂电池铝合金散热片的外观呈银白色,经过120 h盐雾实验后整体腐蚀程度最轻,归因于复合阳极氧化膜对锂电池铝合金散热片表面防护作用优于常规阳极氧化膜和混合酸阳极氧化膜。
6063 aluminum alloy plate was anodized in sulfuric acid electrolyte,sulfuric acid and citric acid mixed electrolyte and the mixed acid electrolyte containing TiO_(2) nanoparticles to prepare different type of anodized films,and the microstructure,composition,phase,thickness and corrosion resistance of different anodized films were tested and analyzed.The results showed that the composite anodized film obtained from the mixed acid electrolyte containing 2.5 g/L TiO_(2) nanoparticles has the best surface uniformity and densification,the content of TiO_(2) particles and the thickness reaches 3.23%and 16.7μm,respectively.The composite anodized film has the highest charge transfer resistance of 6943Ω·cm^(2) and low-frequency impedance modulus of 7618Ω·cm^(2),showing excellent corrosion resistance.After being anodized in the mixed acid electrolyte containing 2.5 g/L TiO_(2) nanoparticles,the aluminum alloy heat sink for lithium battery possesses silver-white appearance,and the overall corrosion degree is the lightest after 120 h salt spray test,which is attributed to the surface protection of the composite anodized film on aluminum alloy heat sink for lithium battery is better than conventional anodized film and mixed acid anodized film.
作者
费强
金标
张彤
闫丽静
张河利
Fei Qiang;Jin Biao;Zhang Tong;Yan Lijing;Zhang Heli(College of Mechanical and Electrical Engineering,Guangdong University of Science and Technology,Dongguan 523083,China)
出处
《电镀与精饰》
CAS
北大核心
2023年第9期6-14,共9页
Plating & Finishing
基金
2022年广东省普通高校青年创新人才类项目(2022KQNCX117)
东莞市社会发展科技重点项目(20231800935832)。
