Which process coats objects with a very thin coating of metal?

Which process coats objects with a very thin coating of metal?

• A. Electrolysis
• B. Electromagnetism
• C. Electroplating
• D. Electroding

Answer: (C)

Coating objects with a very thin layer of metal is done through electroplating. In this process, the item to be plated is placed in an electrolytic bath containing metal ions and acts as the cathode. When direct current is applied, metal ions gain electrons at the cathode and deposit as a metal layer on the object's surface, forming a uniform, thin coating. The bath is designed so the metal to be deposited is replenished (often from a soluble anode), and the thickness is controlled by the current, time, temperature, and bath composition. This is a specific electrochemical application of electrolysis. The other terms aren’t processes for applying a metal coating, which is why electroplating is the correct choice.

Coating objects with a very thin layer of metal is done through electroplating. In this process, the item to be plated is placed in an electrolytic bath containing metal ions and acts as the cathode. When direct current is applied, metal ions gain electrons at the cathode and deposit as a metal layer on the object's surface, forming a uniform, thin coating. The bath is designed so the metal to be deposited is replenished (often from a soluble anode), and the thickness is controlled by the current, time, temperature, and bath composition. This is a specific electrochemical application of electrolysis. The other terms aren’t processes for applying a metal coating, which is why electroplating is the correct choice.