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  2. Chemical coloring of metals - Wikipedia

    en.wikipedia.org/wiki/Chemical_coloring_of_metals

    Various colors on stainless steel 18 Cr / 8 Ni 7.5 g of sodium dichromate , 1000 mL of sulfuric acid (1.24 g/cm 3 ), lead cathodes, object as an anode, 70-90 °C temp, 0,06 A/dm 2 , voltage 1.3 V – colors depend on the duration of the procedure (5-50 min.), brown, blue, reddish brown, yellow, green.

  3. Black oxide - Wikipedia

    en.wikipedia.org/wiki/Black_oxide

    Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. [1] It is used to add mild corrosion resistance, for appearance, and to minimize light reflection. [ 2 ]

  4. Marcasite jewellery - Wikipedia

    en.wikipedia.org/wiki/Marcasite_jewellery

    A similar-looking type of jewellery can be made from small pieces of cut steel. [3] [1] The cut and polished marcasite pieces reflect light at different angles from its different facets giving it a sparkle. [4] Thailand is one of the large producers of modern marcasite jewellery in silver. [citation needed]

  5. Colored gold - Wikipedia

    en.wikipedia.org/wiki/Colored_gold

    Black gold is a type of gold used in jewelry. [13] [14] Black-colored gold can be produced by various methods: Patination by applying sulfur- and oxygen-containing compounds. Plasma-assisted chemical vapor deposition process involving amorphous carbon; Controlled oxidation of gold containing chromium or cobalt (e.g. 75% gold, 25% cobalt [3]).

  6. Stainless steel - Wikipedia

    en.wikipedia.org/wiki/Stainless_steel

    Stainless steel, also known as inox, corrosion-resistant steel (CRES), and rustless steel, is an alloy of iron that is resistant to rusting and corrosion. It contains iron with chromium and other elements such as molybdenum , carbon , nickel and nitrogen depending on its specific use and cost.

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  9. Body piercing materials - Wikipedia

    en.wikipedia.org/wiki/Body_piercing_materials

    However, immune system reaction to nickel is a potential complication of 316.[1][2] Implants and equipment that are put under pressure (bone fixation screws, prostheses, body piercing jewelry) are made out of austenitic steel, often 316L and 316LVM compliant to ASTM F138,.[3] 316 surgical steel is used in the manufacture and handling of food ...