提高铝合金阳极氧化膜抗热裂性研究  

Study on Improving Thermal Cracking Resistance of Aluminum Alloy Anodic Oxide Film

作　　者：金磊 胡中华 张兵 Jin Lei;Hu Zhonghua;Zhang Bing(Dongguan Huizeling Chemical Technology Co.,Ltd.,Dong Guan 523993,China)

机构地区：[1]东莞市慧泽凌化工科技有限公司,广东东莞523993

出　　处：《有色金属加工》2024年第5期50-54,共5页Nonferrous Metals Processing

摘　　要：采用磷酸、硫酸混合液中大电压短时间作为第一步氧化,硫酸、酒石酸、含钼化合物混合液中小电压长时间作为第二步氧化,两步氧化结合在铝合金表面制得开口大且浅、底部窄且深的“喇叭型”多孔层,通过扫描电子显微镜和EDS能谱仪对多孔层进行表征测试,通过高温烘烤以及3C行业通用氧化膜测试方法对封孔后的氧化膜进行性能检测。结果表明,两步氧化得到的“喇叭型”多孔层氧化膜经封闭后能够耐200℃高温达2 h以上,中性盐雾通过72 h测试,酸碱性人工汗通过48 h测试,斑马笔、耐清洗测试等均能符合行业标准。Phosphoric acid and sulfuric acid mixture with high voltage for a short time as the first step of oxidation,sulfuric acid,tartaric acid and molybdenum-containing compound mixture with low voltage for a long time as the second step of oxidation,and the two steps of oxidation combined to produce a"trumpet"porous layer with large and shallow opening and narrow and deep bottom on the surface of aluminum alloy.The porous layer is characterized by scanning electron microscopy and EDS spectrometer.Through high-temperature baking and 3C industry general oxide film test method,the performance of sealed oxide film is tested.The results showed that:the"horn type"porous layer oxide film obtained by two-step oxidation can withstand 200℃high temperature for more than 2 h after sealing,neutral salt spray through 72 h of testing,acid and alkaline artificial sweat through 48 h of testing,zebra pen,cleaning resistance can meet the industry requirements.

关 键 词：铝合金 阳极氧化膜 抗热裂性 喇叭型 

分 类 号：TG174.44[金属学及工艺—金属表面处理]