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electroplating
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Figure 1: Electroplating circuit Figure 2: Periodic chart of metals readily plated
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Figure 1: Electroplating circuit
electroplating
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Category: Science & Tech
Key People:
Werner von Siemens
Johann Wilhelm Ritter
Edward Weston
Related Topics:
plating
electrotyping
electroforming
electrogalvanizing
electrometallurgy
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electroplating, process of coating with metal by means of an electric current. Plating metal may be transferred to conductive surfaces (metals) or to nonconductive surfaces (plastics, wood, leather) after the latter have been rendered conductive by such processes as coating with graphite, conductive lacquer, electroless plate, or a vaporized coating. Figure 1 shows a typical plating tank containing copper sulfate (CuSO4) solution. A dynamo supplies electric current, which is controlled by a rheostat. When the switch is closed, the cathode bar, which holds the work to be plated, is charged negatively. Some of the electrons from the cathode bar transfer ...(100 of 1065 words)

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