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  2. Chalcopyrite - Wikipedia

    en.wikipedia.org/wiki/Chalcopyrite

    Chalcopyrite (/ ˌ k æ l k ə ˈ p aɪ ˌ r aɪ t,-k oʊ-/ [7] [8] KAL-kə-PY-ryte, -⁠koh-) is a copper iron sulfide mineral and the most abundant copper ore mineral. It has the chemical formula CuFeS 2 and crystallizes in the tetragonal system.

  3. List of fictional elements, materials, isotopes and subatomic ...

    en.wikipedia.org/wiki/List_of_fictional_elements...

    Green liquid with symbol Ar and atomic number 7. Makes a compound that is corrosive to copper when mixed with Galine and Sanite, and a compound that produces clouds when exposed to air when mixed with Regalite. The real element 7 is nitrogen; and Ar = argon. Atium Mistborn: Metal. Forms the body and power of the shard Ruin. If an Allomancer ...

  4. Red plague (corrosion) - Wikipedia

    en.wikipedia.org/wiki/Red_plague_(corrosion)

    Red plague is an accelerated corrosion of copper when plated with silver. After storage, damage or use in high-humidity environment, cuprous oxide forms on the surface of the parts. The corrosion is identifiable by presence of patches of brown-red powder deposit on the exposed copper. [1]

  5. List of copper ores - Wikipedia

    en.wikipedia.org/wiki/List_of_copper_ores

    Following is a list of minerals that serve as copper ores in the copper mining process: [1] Image Name Formula % Copper when pure Chalcopyrite: CuFeS 2: 34.5 Chalcocite:

  6. Patina - Wikipedia

    en.wikipedia.org/wiki/Patina

    Copper roof on the Minneapolis City Hall, coated with patina The Dresden Frauenkirche.The church was destroyed during the bombing of Dresden in 1945 and then rebuilt from 1993 to 2005 with new material; the stones with the black patina are the parts that survived the firebombing from the original 18th-century church.

  7. Galvanic corrosion - Wikipedia

    en.wikipedia.org/wiki/Galvanic_corrosion

    Rhodium-plated on silver-plated copper: −0.05 Silver, solid or plated; monel metal; high nickel-copper alloys: −0.15 Nickel, solid or plated; titanium and its alloys; monel: −0.30 Copper, solid or plated; low brasses or bronzes; silver solder; German silvery high copper-nickel alloys; nickel-chromium alloys: −0.35 Brass and bronzes: −0.40

  8. Dream SMP - Wikipedia

    en.wikipedia.org/wiki/Dream_SMP

    Dream uses a separate Minecraft account to play as DreamXD, the god of the Dream SMP and who has canon access to creative mode. [ 9 ] [ 6 ] The Disc Saga, the server's longest-running story arc, was a series of events centered around two rare music discs belonging to TommyInnit.

  9. Chemical coloring of metals - Wikipedia

    en.wikipedia.org/wiki/Chemical_coloring_of_metals

    Black for copper. Solution of sodium polysulfide 2.5%, items must be submerged in the solution after color developing, wash, dry and wax or varnish colored object. [27] Brown for copper. Items are boiled in at least 3-day-old water solution of 12% copper sulfate, after color being developed, the material is washed, dried and waxed or varnished ...