| abstract |
[PROBLEMS] To provide a novel composition having a low global warming potential, a low impact on the environment, low toxicity, and non-combustibility as a protective gas effective for preventing combustion due to extreme oxidation in the production of magnesium and magnesium alloys. And a combustion protection method using them. A protective gas composition comprising a fluorine-containing organic compound and a carrier gas, which prevents rapid oxidation and combustion of molten magnesium or a magnesium alloy, wherein the fluorine-containing organic compound is a hydrofluorocarbon, a hydrofluoroether, and their A composition selected from the group consisting of a mixture. [Selection figure] None |