Explain electroplating process

1 Answer

Answer :

Electroplating Process: Electroplating may be described as a process of covering a surface or object usually metallic with a thin adherent coating of same or other metal by electrolysis. The form of original parts is retained. Figure shows a typical electroplating process. A DC voltage is applied between parts to be plated (which is made cathode) and anode material that is either material to be plated or an inert electrode. Both of these metals are immersed in a electrolyte, which may also contain dissolved salts of the metal to be plated, as well as additions to increase or control conductivity. When voltage is applied, metal ions migrate to the cathode lose their charge, and deposit on the surface. The main factors governing the plating are current density, concentration of electrolyte, and temperature of bath. Almost all commercially available metals can be plated, including aluminium, copper, brass, steel, zincbased die castings. Plastics can be electroplated provided that they are first coated with an electrically conductive material. The most common plantings are zinc, chromium, nickel, copper, tin, and precious metals like gold platinum, silver and rhodium. Chromium plating is widely used because of its pleasing appearance and its resistance to corrosion and wear. Gold, silver and platinum plating are used in jewellery and electronic industry. 

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