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black copper

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black copper [¦blak ′käp·ər]
(metallurgy)
The more or less impure metallic copper (70-99% copper) produced in blast furnaces when running on oxide ores or roasted sulfide material.


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1) Depending on the initial concentration of sulphur in PE and the period of sulphurized polymer treatment with the solution of the copper salt, brown or even black copper sulphide layers on PE were obtained.
A basic hot water system usually consists of a solar collector--basically a small metal box with a glass or plastic cover and a black copper or aluminum absorber plate inside--tied into the building's plumbing and electrical works.
They are basically flat boxes (usually 4 x 8 feet) covered with tempered glass, through which serpentine loops of black copper pipes are set against an absorber plate.
 
 
 
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