Corrosion resistance and anodic oxidation of CNT/Al-alloy composites

碳纳米管/铝基复合材料阳极氧化与耐腐蚀性能 Corrosion resistance and anodic oxidation of CNT/Al-alloy composites 申世军 SHEN Shijun 1 2 first-author 钱小明 QIAN Xiaoming 1 陈登海 CHENG Denghai 1 王煜 WANG Yu 1 谭占秋 TAN Zhanqiu 3 李志强 LI Zhiqiang 3 上海航天设备制造总厂有限公司 上海航天设备制造总厂有限公司 Shanghai Aerospace Equipments Manufacturer Shanghai Aerospace Equipments Manufacturer 西北工业大学 西北工业大学 Northwestern Polytechnical University Northwestern Polytechnical University 上海交通大学 上海交通大学 Shanghai Jiao Tong University Shanghai Jiao Tong University 采用叠片粉末冶金技术制备CNT/2024Al复合材料锭坯,经热轧变形加工后,通过阳极氧化在板材表面生成一层均匀、致密的氧化膜,并对阳极氧化后的复合材料板材抗盐雾腐蚀性能进行研究。采用SEM对比分析了复合材料板材的阳极氧化膜微观结构及其在盐雾气氛下的变化规律;采用万能拉伸试验机研究阳极氧化对盐雾腐蚀后材料力学性能的影响。结果表明,未经阳极氧化的样品,暴露在盐雾条件下将发生显著的腐蚀现象,导致材料的拉伸强度和延伸率降低;采用阳极氧化处理后,会在复合材料表面生成约2μm的致密氧化膜,可有效阻止盐雾腐蚀,有效避免材料腐蚀后的力学性能下降。 By anodic oxidation,a dense oxide film was produced on the surface of CNT/2024 Al composite prepared by powder metallurgy. The effect of anodic oxidation on the corrosion behavior of CNTs reinforced Al-alloy composite was studied by salt spray corrosion test. The evolution of surface and cross section of anodic oxide film under salt spray was investigated by SEM,and its effect on mechanical property of composite after salt spray corrosion was further studied. The results show that the non-anodized samples will be corroded remarkably when exposed to salt spray,and the tensile strength and elongation will greatly decrease. By anodic oxidation,stable dense oxide film of about 2 μm can be formed on the surface of the composites. Compared with the non-anodized samples,the corrosion under salt spray can be effectively prevented,and the mechanical properties of the materials do not significantly reduce. 碳纳米管/铝基复合材料 阳极氧化 盐雾腐蚀 力学性能 anodic oxidation salt-spray corrosion Al matrix composites CNTs TB333 2022-03-08 1 50