摘要
The influence of adipic acid on the formation and corrosion resistance of anodic oxide film fabricated on 2024 aluminum alloy was investigated. The morphology was investigated by scanning electron microscopy （SEM） and transmission electron microscopy （TEM）, respectively. The corrosion resistance was evaluated by electrochemical impedance spectroscopy （EIS）. The results showed that the adipic acid was absorbed at the electrolyte/anodic layer interface during anodizing. The corrosion rate of anodic film decreased and the film thickness increased. The film was uniform and compact especially at the film/substrate interface. After sealing procedure, anodic film formed with the addition of adipic acid exhibited improved dielectric property and corrosion resistance in aggressive environment.
研究己二酸对2024铝合金阳极氧化膜层形成及膜层耐蚀性能的影响。采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)对膜层的形貌进行表征,采用电化学阻抗谱(EIS)对膜层的耐蚀性能进行研究。结果显示,在阳极氧化过程中,己二酸在槽液/氧化膜界面产生吸附,使膜层溶解速度降低、膜层厚度增加,并且膜层结构更加均匀致密,特别是在膜层/基体界面,膜层的规整性得到改善。经过封闭处理后,在添加己二酸的阳极氧化槽液中形成的膜层具有更加优异的介电性能,在腐蚀性环境中具有更好的耐蚀性能。
基金
Project(51271012)supported by the National Natural Science Foundation of China
