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Trivalent chromium plating, also known as tri-chrome, Cr 3+, and chrome(III) plating, uses chromium sulfate or chromium chloride as the main ingredient. Trivalent chromium plating is an alternative to hexavalent chromium in certain applications and thicknesses (e.g. decorative plating). [2]
Its ingredients include chromium(IV) oxide, barium nitrate, sodium silicofluoride and ferricyanide. [12] In the aluminum industry, the process is also called chemical film [13] or yellow iridite, [13] Commercial trademarked names include Iridite [13] and Bonderite [14] (formerly known as Alodine, or Alocrom in the UK). [15]
Marvin J. Udy (/ˈjuːdi/; 19 February 1892 – 11 April 1959) was an American scientist, inventor, chemical engineer, metallurgist, and entrepreneur who is best known for his development of the Udylite process for cadmium plating as well as processes to refine chromium, nickel, cobalt and bismuth. [1] [2]
Black nickel plating was developed around 1905, and between the two wars, black chrome plating (first German patent 1929.GP 607, 420), which saw wider use only from the mid-1950s. [14] After the First World War, the first procedures for anodic oxidation and coloring of anodically oxidized aluminium were developed (1923, 1924.DRP. 413876).
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 ...
Along with a financier, a technician, and a salesman, he formed the Erie Plating Company, the first electroplating company in northwest Pennsylvania. Erie Plating Company now serves customers through the Eastern United States. At the time of the company's founding the electroplating industry was in its infancy.
Carbon steel and iron are commonly polished to a #7 finish before chrome plating. A #7 finish can be made bright by color buffing with coloring compound and a cotton buff. This is commonly applied to keep polishing costs down when a part needs to be shiny but not flawless. #8 Finish. Also known as a mirror finish.
Pyrolytic chromium carbide coating (PCC) is a technology for protection and reworking of rapidly wearing parts of manufacturing equipment working in extreme environmental conditions, using vacuum deposition technology.
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