Investigating the anodizing process of Aluminum alloys in 0.3M Oxalic acid and its metallurgical and mechanical behavior

توضیح سیویلیکا: اطلاعات مقاله طبق درخواست 40095 حذف موقت تا اواخر اسفند 95 گردید.]The unique nature of the porous alumina oxide layer on the substrate of aluminum alloys in last decades, have attracted the attention of sciences. Anodizing is an electrochemical process to increase the thickness of the natural oxide layer on the surface of Aluminum alloys. Anodizing, increase corrosion and wear resistance of alloys and changes the crystalline structure of the Aluminum alloys near. Anodic layers are generally hard and fragile. Pore diameter, distance between pores, wall thickness, barrier layer thickness and pore density are the most important factorsthat are related to anodizing process. In this study, we worked on anodizing of Aluminum 1100 to produce nanostructure pores. In this paper, two step anodizing were performed in 0.3M oxalic acid. Voltage and current density were recorded during the tests. Related to their curves the transition from mild to hard anodizing observed. FESEM Micrographs, confirmed the results of the anodizing too. At least, Hardness of aluminum alloys are investigated and results showed that, hardness of alloys change according to Voltage and current density. These structures are suitablefor aircraft industries to improve their mechanical and metallurgical properties

Keywords:

Aluminum , Anodizing , Electrochemical , Nanostructure , Hardne