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"Black nickel" is a dark coating that consists primarily of nickel sulfide and metallic zinc and nickel. [14] It is typically plated on brass, bronze, or steel in order to produce a non-reflective surface. [15] This type of plating is used for decorative and military purposes and does not offer much protection. [1] [2] [15]
Chrome plating (less commonly ... Plating thickness ranges from 5 to 50 μin (0.13 to 1.27 μm). [2] ... The chromium plating is usually applied over bright nickel ...
Nichrome (also known as NiCr, nickel-chromium or chromium-nickel) is a family of alloys of nickel and chromium (and occasionally iron [1]) commonly used as resistance wire, heating elements in devices like toasters, electrical kettles and space heaters, in some dental restorations (fillings) and in a few other applications.
Electroless nickel plating, also known as enickel and NiP, offers many advantages: uniform layer thickness over most complicated surfaces, direct plating of ferrous metals (steel), superior wear and corrosion resistance compared to electroplated nickel or chrome. Much of the chrome plating done in aerospace industry can be replaced with ...
The main ingredients of an electroless nickel plating bath are source of nickel cations Ni 2+, usually nickel sulfate and a suitable reducing agent, such as hypophosphite H 2 PO − 2 or borohydride BH − 4. [1] With hypophosphite, the main reaction that produces the nickel plating yields orthophosphite H 2 PO − 3, elemental phosphorus ...
Electroless nickel-boron plating developed as a variant of the similar nickel-phosphorus process, discovered accidentally by Charles Adolphe Wurtz in 1844. [2]In 1969, Harold Edward Bellis from DuPont filed a patent for a general class of electroless plating processes using sodium borohydride, dimethylamine borane, or sodium hypophosphite, in the presence of thallium salts, thus producing a ...
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