Protective atmospheres of metals and alloys under elevated temperatures based on gases exhibiting reduced effect on global calescence

摘要

An improved method of processing a nonferrous metal and alloys of said metal using a blanketing gas having a global warming potential is provided. The improvement involves reducing the global warming potential of the blanketing gas by blanketing the nonferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of COF₂, CF₃COF, (CF₃)₂CO, F₃COF, F₂C(OF)₂, SO₂F₂, NF₃, SO₂ClF, SOF₂, SOF₄, NOF, F₂ and SF₄.