تأثير ميزان منيزيم روي خصوصيات فيلم هاي اكسيدي در آلياژهاي آلومينيوم -منيزيم

Effects of Magnesium Contents on Characteristics of Al-Mg Alloys Oxide Films

Molten Aluminum-magnesium alloys oxidize rapidly during casting and handling if adequate prevention measures are not taken. Oxide films that form in a very short time during pouring the melt into moulds seem to be one of the main reasons for dross-like defects, porosities and etc. The characteristics of these films in Al-lMg and Al-5Mg were studied and compared with the results of similar researches published in literature. For this investigation, Samples of oxide-metal-oxide sandwich were prepared by the bubble impingement technique. Features such as thickness, size and morphology of the oxide film have been examined by SEM. Results show that thickness of oxide folding increase with increasing the magnesium content in Al-Mg alloys.