![]() By regulating parameters such as the time the piece remains in the electrolytic solution, the fabricator can control the thickness of the chromium. The application of an electrical current for a specified period of time causes chromium to bond to the surface of the work piece. Then, to apply the chromium, the metal part manufacturer places the work piece in a chromium industrial electroplating vat and heats the solution to a designated temperature. For instance, many fabricators first electroplate parts with nickel prior to applying decorative chromium plating. Depending upon the composition of the part, fabricators apply one or more pretreatments. Usually, a manufacturer must first thoroughly clean a work piece to remove debris and grease. Variations exist in production technologies. The process of trivalent chromium electroplating usually requires several steps. Typically, trivalent chromium electroplating solutions rely upon either chloride or sulfate-based electrolytes. In the past hexavalent chromium solutions enjoyed widespread use, although more recently trivalent chromium electroplating solutions have gained greater popularity. Experts recommend using different plating tanks for hexavalent and trivalent chromium plating. During electroplating, a manufacturer typically places a metal component in a chromium solution and applies an electrical current to cause the deposition of chromium onto the surface of the metal work piece. The two most widely used forms of chromium plating solutions rely upon hexavalent or trivalent electrolytes. It also often produces aesthetic changes which give products an attractive silvery sheen. Chromium plating increases surface hardness and makes it easier to maintain metal surfaces in a clean condition. Considerable differences exist between hard chromium plating and decorative plating, however. For instance, electroplating a thin layer of chromium over nickel surfaces can help create a brighter, even shinier metal exterior to enhance a product’s aesthetic appeal to consumers. They may alternatively apply a thinner layer of chrome for primarily decorative purposes. Manufacturers perform “hard” chrome plating by applying a thick layer of chromium to metal parts to enhance wear resistance. It offers both practical and aesthetic benefits. Since at least 1924, chromium plating has played an important role in the finishing of metal parts and components. Trivalent chromium plating has become a widely-used surface treatment in some industries. Frequently, companies choose to apply several surface treatments during the finishing stage in order to produce metal parts meeting specific objectives. This capability enables designers of some metal components to alter or modify specific exterior qualities, such as electrical conductivity, texture, color, and more. The automotive specification calling out Dusk Chrome is a combination of a satin nickel coating and a black chrome finish.Today, industrial parts manufacturers can make their products more competitive in the marketplace by using a variety of surface treatments. Each of these plating combinations will develop a different appearance from a bright shiny black to a dull matte black finish. The main advantages of the newer black chrome plating processes are that they do not need to be waxed or oiled to improve the final metal finish.īlack chromes can be plated over bright nickel, satin nickel, or dull nickel. This metal plating process provides better coverage of the entire part. The newer black chrome process plate a smoother, more reflective, dark chrome finish that does not require a post dip for corrosion protection. ![]() The black color is achieved by alloying other metals with the chromium deposit. Newer black chrome plating processes have been developed from a trivalent chrome process. The finish may be waxed or oiled to improve the final appearance. The finish can be a lustrous, semi-lustrous or a matte. The appearance of the black chrome finish depends on the nature of the substrate and the surface treatment prior to electroplating. This extraordinary black chrome finish provides a hard surface, which possesses corrosion and wear resistant characteristics. The black chrome finishes were used on non-reflective surfaces and usually required a post-dip in a oil solution for the metal finishing portion.īlack chrome is usually electroplated over bright nickel or dull nickel in the same manner as decorative chrome. ![]() ![]() Developed by Allied Chemical in the 1960’s, the early black chromium deposits were hard and more textured than decorative chrome. Black Chrome Plating Black Chrome Plating Suppliers to a Wide Range of Industriesīlack Chrome has been in existence for over 50 years.
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