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
Key words
aluminum alloy/anodic oxide film/thermal cracking resistance/trumpet type
维普
万方数据