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  2. List of RAL colours - Wikipedia

    en.wikipedia.org/wiki/List_of_RAL_colours

    ICE train text, electrical and instrumentation panels. RAL 7036: Platinum grey: RAL 7037: Dusty grey: RAL 7038: Agate grey: RAL 7039: Quartz grey: RAL 7040: Window grey: RAL 7042: Traffic grey A: RAL 7043: Traffic grey B: RAL 7044: Silk grey: RAL 7045: Telegrey 1: 1992 introduced for Deutsche Bundespost (Telekom) RAL 7046: Telegrey 2: 1992 ...

  3. Tempering (metallurgy) - Wikipedia

    en.wikipedia.org/wiki/Tempering_(metallurgy)

    Tempering was usually performed by slowly, evenly overheating the metal, as judged by the color, and then immediately cooling, either in open air or by immersing it in water. This produced much the same effect as heating at the proper temperature for the right amount of time, and avoided embrittlement by tempering within a short time period.

  4. Sheet metal - Wikipedia

    en.wikipedia.org/wiki/Sheet_metal

    Sheet metal is available in flat pieces or coiled strips. The coils are formed by running a continuous sheet of metal through a roll slitter. In most of the world, sheet metal thickness is consistently specified in millimeters. In the U.S., the thickness of sheet metal is commonly specified by a traditional, non-linear measure known as its ...

  5. RAL colour standard - Wikipedia

    en.wikipedia.org/wiki/RAL_colour_standard

    RAL Colours logo. RAL is a colour management system used in Europe that is created and administered by the German RAL gGmbH [] [1] (RAL non-profit LLC), which is a subsidiary of the German RAL Institute [].

  6. Chemical coloring of metals - Wikipedia

    en.wikipedia.org/wiki/Chemical_coloring_of_metals

    Chemical coloring of metals is the process of changing the color of metal surfaces with different chemical solutions. The chemical coloring of metals can be split into three types: electroplating – coating the metal surface with another metal using electrolysis. patination – chemically reacting the metal surface to form a colored oxide or ...

  7. Chromate conversion coating - Wikipedia

    en.wikipedia.org/wiki/Chromate_conversion_coating

    The chromate coating process starts with a redox reaction between the hexavalent chromium and the metal. [2] In the case of aluminum, for example, Cr 6+ + Al 0 → Cr 3+ + Al 3+ The resulting trivalent cations react with hydroxide ions in water to form the corresponding hydroxides, or a solid solution of both hydroxides: Cr 3+ + 3 OH − → Cr ...

  8. Prepainted metal - Wikipedia

    en.wikipedia.org/wiki/Prepainted_metal

    According to EN 13523-0, a prepainted metal (or coil coated metal) is a ‘metal on which a coating material (e.g. paint, film…) has been applied by coil coating’.When applied onto the metallic substrate, the coating material (in liquid, in paste or powder form) forms a film possessing protective, decorative and/or other specific properties.

  9. Anodizing - Wikipedia

    en.wikipedia.org/wiki/Anodizing

    The color resulting from interference shifts from blue, green, and yellow to red as the deposited metal layer thickens. Beyond a specific thickness, the optical interference vanishes, and the color turns bronze. Interference-colored anodized aluminum parts exhibit a distinctive quality: their color varies when viewed from different angles.

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