Search Results for: Metal carbides for working metal
thousands of years later, it was the first metal to be smelted from sulfide ores, c. bc; the first metal to be cast into a shape in a mold, c. bc; and the first metal to be purposefully alloyed with another metal, tin , to create bronze , c. bc. [ ] in the roman era , copper was mined principally on
colors to such minerals as azurite , malachite , and turquoise , and have been used widely and historically as pigments. copper used in buildings, usually for roofing, oxidizes to form a green verdigris (or patina ). copper is sometimes used in decorative art , both in its elemental metal form and in...
https://en.wikipedia.org/wiki/Copper