摘要
汽车、动车等交通运输工具的轻量化以及我国海洋战略的实施,扩大了铝合金的应用领域,也对铝合金阳极氧化膜性能提出了更高的要求。介绍了硫酸、铬酸、草酸3种单一酸阳极氧化体系以及硫酸-硼酸、硫酸-有机酸2个混合酸阳极氧化体系的基本工艺、性能与用途。结合铝合金应用领域,提出了制备高耐蚀、高韧性、高膨胀系数、抗冲击阳极转化膜的实际需求,研发新的阳极氧化体系、通过阳极氧化与化学转化形成复合转化膜是实现氧化膜性能提升的根本途径。作者团队还提出了几种可行的铝合金复合氧化膜制备体系,通过试验制备了以氧化铝为主的复合氧化膜,膜层孔隙率达60%,弯曲90°基本没有裂纹,远超过普通硫酸阳极氧化膜,对进一步研发具有指导意义。
The lightweight of automobiles,high-speed trains and other transportation vehicles,as well as the implementation of China’s marine strategy,has expanded more application fields for aluminum alloys and put forward higher requirements for the performance of anodic oxide film on aluminum alloy.In this paper,the basic processes,properties,and applications of three single acid anodic oxidation systems of sulfuric acid,chromic acid and oxalic acid,as well as two mixed acid anodic oxidation systems of sulfuric acid-boric acid and sulfuric acid-organic acid were introduced.Combined with the application field of aluminum alloy,the actual demand for the preparation of anodic conversion film with high corrosion resistance,high toughness,high expansion coefficient,impact resistance was put forward.The fundamental way to improve the performance of the oxide film was to develop a new anodic oxidation system and form a composite conversion film through anodic oxidation and chemical conversion.Several feasible aluminum alloy composite oxide film preparation systems were proposed by the author team,and a composite oxide film mainly composed of alumina was prepared through experiments.The porosity of the film reached 60%,and there were ba-sically no cracks after bending at 90°,much better than that of ordinary sulfuric acid anodic oxide films,which presented the guiding signifi-cance for further research and development.
作者
刘峻铭
冯秋宇
高瑞安
齐恩亮
冯立明
LIU Junming;FENG Qiuyu;GAO Ruian;QI Enliang;FENG Liming(School of Materials Science and Engineering,Shandong Jianzhu University,Jinan 250101,China;National Quality Supervision and Inspection Center for Aluminum Profiles and Door and Window Products(Shandong),Weifang 262600,China;Weifang Guoyi Aluminum Material Co.Ltd.,Weifang 262600,China)
出处
《材料保护》
CAS
CSCD
2023年第7期157-164,187,共9页
Materials Protection
基金
中央引导地方科技发展资金项目(YDZX2022112)资助。
关键词
铝合金
阳极氧化
复合转化膜
aluminum alloy
anodic oxidation
composite conversion films
