Abstract: Aluminum film on uranium is prepared using magnetron sputtering with and without circulated argon ion bombardment process. Auger electron spectroscopy (AES) analysis shows there is a significant diffusion and chemical reactions take place in the interface between metal uranium and aluminum film produced with circulated argon ion bombardment process, which results in the formation of UAl 3 and Al 2O 3 phases. The interfacial role to improve the corrosion resistance of aluminum coated uranium in the atmosphere is discussed.