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  2. Chromate conversion coating - Wikipedia

    en.wikipedia.org/wiki/Chromate_conversion_coating

    The formula was meant to be dissolved in water at the concentration of 9.0 g/L, giving a bath with pH = 1.5. It yielded a light gold color after 1 min, and a golden-brown film after 3 min. The average thickness ranged between 200 and 1000 nm. [6] Iridite 14-2 is a chromate conversion bath for aluminum.

  3. Chemical coloring of metals - Wikipedia

    en.wikipedia.org/wiki/Chemical_coloring_of_metals

    Black for aluminum. Boil a solution of 20 g ammonium molybdate and 5 g of sodium thiosulfate in a liter of water, immerse the objects, rinse, dry, wax or lacquer after the development of color. [31] Lustre colours. Use a solution of 280 g of sodium thiosulphate, 25 g of cupric acetate and 30 g of citric acid. It can be used on copper and its ...

  4. Gold–aluminium intermetallic - Wikipedia

    en.wikipedia.org/wiki/Gold–aluminium_intermetallic

    Au 5 Al 2 typically forms at 95% of Au and 5% of Al by mass, its melting point is about 575 °C, which is the lowest among the major gold-aluminum intermetallic compounds. AuAl 2 is a brittle bright-purple compound, with a composition of about 78.5% Au and 21.5% Al by mass.

  5. Plating - Wikipedia

    en.wikipedia.org/wiki/Plating

    Plating is a finishing process in which a metal is deposited on a surface. Plating has been done for hundreds of years; it is also critical for modern technology. Plating is used to decorate objects, for corrosion inhibition, to improve solderability, to harden, to improve wearability, to reduce friction, to improve paint adhesion, to alter conductivity, to improve IR reflectivity, for ...

  6. Zinc chromate - Wikipedia

    en.wikipedia.org/wiki/Zinc_chromate

    Zinc chromate's main use is in industrial painting as a coating over iron or aluminium materials. [8] It was used extensively on aircraft by the US military, especially during the 1930s and 1940s. It is also used in a variety of paint coatings for the aerospace and automotive industries. [9]

  7. NYT ‘Connections’ Hints and Answers Today, Tuesday, December 10

    www.aol.com/nyt-connections-hints-answers-today...

    Spoilers ahead! We've warned you. We mean it. Read no further until you really want some clues or you've completely given up and want the answers ASAP. Get ready for all of today's NYT ...

  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. Gold vs. silver: Which is better for your portfolio?

    www.aol.com/gold-vs-silver-better-portfolio...

    Gold has been a hot investment lately. Since early 2024, its price has climbed steadily, hitting a record of over $2,600 per ounce in September. Investors are flocking to gold for inflation ...

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