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Electroplating is defined as the use of electrolysis to add a layer of metal to an object. This process involves a conductive surface being coated with a thin layer of metal, enhancing its properties such as appearance, corrosion resistance, and conductivity. During electroplating, an electric current is passed through a solution containing metal ions. The metal ions are reduced and deposit onto the surface of the object, thus forming a uniform layer of the metal.

In this process, the object to be coated acts as the cathode (negative electrode), while a metal electrode, usually made of the metal intended for the coating, serves as the anode (positive electrode). The metal ions from the electrolyte move towards the cathode and, as the current flows, they gain electrons and form a solid metal layer on the object.

The other choices do not accurately describe the electroplating process. Alloying two metals refers to mixing them to create an alloy rather than applying a coating. Creating strong ropes is unrelated to electroplating, and converting metal into powder pertains to a different process entirely, usually involving mechanical or chemical methods. Therefore, the description of electroplating as a method of using electrolysis to apply a metal layer is indeed the correct characterization of the

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