Blanketing molten nonferrous metals and alloys with gases having reduced global warming potential

A process for preventing oxidation of a molten nonferrous metal and alloys of said metal comprising blanketing said molten nonferrous metal and alloys with an atmosphere containing an effective amount of at least one compound selected from the group consisting of SO2F2, NF3, SO2CLF, SOF4, and NOF.

In a method of processing a melt comprising at least one molten nonferrous metal using a blanketing gas having a global warming potential, the improvement comprising reducing said global warming potential of said blanketing gas by blanketing said melt with a gaseous mixture including at least one compound selected from the group consisting of SO2F2, NF3, SO2CLF, SOF4, and NOF.

A process for preventing oxidation of a melt comprising at least one molten nonferrous metal, said process comprising blanketing said melt with an atmosphere containing an effective amount of at least one compound selected from the group consisting of SO2F2, NF3, SO2CLF, SOF4, and NOF.

In a method of processing a molten nonferrous metal and alloys of said metal using a blanketing gas having a global warming potential, the improvement comprising reducing said global warming potential of said blanketing gas by blanketing said molten nonferrous metal and alloys with a gaseous mixture including at least SF4 at a first concentration of less than about 10% on a mole basis of said gaseous mixture and CO2 at a second concentration of about 30% to about 60% on a mole basis.

A process for preventing oxidation of a molten nonferrous metal and alloys of said metal comprising blanketing said molten nonferrous metal and alloys with an atmosphere containing an effective amount of at least SF4 at a first concentration of less than about 10% on a mole basis of said atmosphere and CO2 at a second concentration of about 30% to about 60% on a mole basis.

In a method of processing a melt comprising at least one molten nonferrous metal using a blanketing gas having a global warming potential, the improvement comprising reducing said global warming potential of said blanketing gas by blanketing said melt with a gaseous mixture including at least SF4 at a first concentration of less than about 10% on a mole basis of said gaseous mixture and CO2 at a second concentration of about 30% to about 60% on a mole basis.

A process for preventing oxidation of a melt comprising at least one molten nonferrous metal, said process comprising blanketing said melt with an atmosphere containing an effective amount of at least SF4 at a first concentration of less than about 10% on a mole basis of said atmosphere and CO2 at a second concentration of about 30% to about 60% on a mole basis.