Molten magnesium can oxidize rapidly in atmospheres containing oxygen. During the casting and handling of molten magnesium, it is essential to protect the melt from ignition. The protective gas normally contains air and/or CO 2 , and with a small amount of an inhibiting agent. This study examined the minimum amount of SF 6 gas needed depending on the type of carrier gas, as well as the effects of the melt temperature, exposure time and SF 6 concentration on the surface film of molten magnesium. The analysis methods of the surface film included the XPS/depth profile and SEM/EDS. The minimum amount of SF 6 gas concentration determined over a wide a range of different carrier gases, such as air, N 2 and CO 2 . The surface film thickness decreased with increasing SF 6 concentration under all conditions, such as the melt temperature, exposure time and different carrier gas.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.