enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Chrome plating - Wikipedia

    en.wikipedia.org/wiki/Chrome_plating

    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). [3]

  3. Electrochemical coloring of metals - Wikipedia

    en.wikipedia.org/wiki/Electrochemical_coloring...

    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).

  4. RoHS - Wikipedia

    en.wikipedia.org/wiki/RoHS

    Hexavalent chromium is used in chrome plating, chromate coatings and primers, and in chromic acid. The maximum permitted concentrations in non-exempt products are 0.1% or 1000 ppm (except for cadmium, which is limited to 0.01% or 100 ppm) by weight.

  5. Electroplating - Wikipedia

    en.wikipedia.org/wiki/Electroplating

    Electroplating baths and equipment based on the patents of the Elkingtons were scaled up to accommodate the plating of numerous large-scale objects and for specific manufacturing and engineering applications. The plating industry received a big boost with the advent of the development of electric generators in the late 19th

  6. Diffusion barrier - Wikipedia

    en.wikipedia.org/wiki/Diffusion_barrier

    If chromium is plated directly onto the steel, then their different thermal expansion coefficients will cause the chrome plating to peel off the steel. Nickel, Nichrome, tantalum, hafnium, niobium, zirconium, vanadium, and tungsten are a few of the metal combinations used to form diffusion barriers for specific applications.

  7. 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 ...

  8. Why are first-round College Football Playoff games on campus ...

    www.aol.com/why-first-round-college-football...

    A first-of-its-kind College Football Playoff officially kicks off Friday at 8 p.m. ET with No. 9 Indiana taking the three-hour-plus drive north US-31 to Notre Dame Stadium looking to upset No. 3 ...

  9. Chromate conversion coating - Wikipedia

    en.wikipedia.org/wiki/Chromate_conversion_coating

    In particular, concerns about the exposure of workers to chromates and dichromates while handling the immersion bath and the wet parts, as well as the small residues of those anions that remain trapped in the coating, have motivated the development of alternative commercial bath formulations that do not contain hexavalent chromium; [17] for ...