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Stellite was invented by Elwood Haynes [1] in the early 1900s, initially as a material for making cutlery that would not stain or require constant cleaning. He was granted a patent for two specific alloys in 1907, and for two related ones in 1912; once he had these four patents he went into the business of producing his metal alloys.
Chrome plating (less commonly chromium plating) is a technique of electroplating a thin layer of chromium onto a metal object. A chrome plated part is called chrome, or is said to have been chromed. The chromium layer can be decorative, provide corrosion resistance, facilitate cleaning, and increase surface hardness. Sometimes a less expensive ...
Chromium carbide is useful in the surface treatment of metal components. Chromium carbide is used to coat the surface of another metal in a technique known as thermal spraying. Cr 3 C 2 powder is mixed with solid nickel-chromium. This mixture is then heated to very high temperatures and sprayed onto the object being coated where it forms a ...
Gray silicon carbide abrasives are used on hard and brittle substances, such as grey iron and cemented carbide, and low tensile strength metals, such as brass, aluminium, and copper. [1] Green chromium(III) oxide is the abrasive used in green compounds that are typically used to finish ferrous metals (steels).
Coating mechanical parts can help with problems of corrosion, adhering, high-temperature and mechanical wear thus reducing unplanned repairs and loss of production. The features of PCC coatings are: obtaining protective layers with high adhesion strength on parts and products made of various engineering materials including metal and non-metal ...
Chromium(III) oxide (Cr 2 O 3) is a metal polish known as green rouge. [94] [95] Chromic acid is a powerful oxidizing agent and is a useful compound for cleaning laboratory glassware of any trace of organic compounds. [96] It is prepared by dissolving potassium dichromate in concentrated sulfuric acid, which is then used to wash the apparatus.
Some of them, including titanium carbide and tungsten carbide, are important industrially and are used to coat metals in cutting tools. [3] The long-held view is that the carbon atoms fit into octahedral interstices in a close-packed metal lattice when the metal atom radius is greater than approximately 135 pm: [2]
Chromate conversion coating or alodine coating is a type of conversion coating used to passivate steel, aluminium, zinc, cadmium, copper, silver, titanium, magnesium, and tin alloys. [ 1 ] : p.1265 [ 2 ] The coating serves as a corrosion inhibitor , as a primer to improve the adherence of paints and adhesives , [ 2 ] as a decorative finish, or ...
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