| 摘要 |
PROBLEM TO BE SOLVED: To provide a protective gas composition, which has a small global warming potential and little influence on the environment, has low toxicity, and has nonflammability, as a protective gas effective for preventing combustion of magnesium and magnesium alloy in such a wide temperature range of molten metal as 600-800°C when manufacturing magnesium and magnesium alloy. SOLUTION: The protective gas composition for preventing combustion of molten magnesium/magnesium alloy comprises trifluoromethane iodide (CF<SB>3</SB>I), which is a fluorine-containing organic compound, and a carrier gas. COPYRIGHT: (C)2008,JPO&INPIT
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