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Electroless plating, also
known as chemical or auto-catalytic plating, is a non-galvanic type of plating method that involves several simultaneous reactions in an aqueous solution, which occur without the use of external electrical power. The reaction is accomplished when hydrogen is released by a reducing agent, normally sodium hypophosphite, and oxidized thus producing a negative charge on the surface of the part. The most common electroless plating method is electroless nickel plating.
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Electroless nickel plating
has
several advantages versus nickel sulfamate
(electrolytic) plating. Free from flux-density
issues, it provides an even deposit regardless of
workpiece geometry, and with the proper pre-plate
catalyst, can deposit on non-conductive surfaces.
Advantages
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| Electroless nickel plating is achieved by forming a thin layer of nickel phosphate on a solid workpiece such as metals and plastics. The thickness of the plating film is usually measured in micrometers. It is used in aviation, automotive, electronic fabrication (HDD), and printing press manufacturing among others. This plating technique is to prevent the occurrence of oxidation (rust), to make or restore fine dimension and to improve the surface finish of a particular component. | ||
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