Whaen we copper powder why has the black colour layer formed
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Copper Brazing Filler Metals
Copper brazing alloys are well known for their excellent resistance to corrosion, high electrical conductivity, and high thermal conductivity and are generally used for brazing carbon and alloy steels, stainless steel, nickel, and copper-nickel. Copper alloys are ductile, wet iron appropriately, and exhibit excellent joint penetration. These alloys are primarily used in furnace brazing with protective reducing atmospheres without a flux. Flux may be required for metals that have constituents with oxides that are difficult to
Copper brazing alloys are well known for their excellent resistance to corrosion, high electrical conductivity, and high thermal conductivity and are generally used for brazing carbon and alloy steels, stainless steel, nickel, and copper-nickel. Copper alloys are ductile, wet iron appropriately, and exhibit excellent joint penetration. These alloys are primarily used in furnace brazing with protective reducing atmospheres without a flux. Flux may be required for metals that have constituents with oxides that are difficult to
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because copper react with atmospheric oxygen and for copper oxide of black colour in form of layer
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