Copper electroplating is an electrochemical process that deposits a thin layer of copper onto a conductive surface (the cathode) by passing an electric current through a solution containing copper ions (the electrolyte) from a copper source (the anode). It is one of the most widely used metal finishing techniques due to copper's high conductivity, malleability, and affordability. Key Benefits Applications
High Conductivity: Copper is second only to silver in electrical and thermal conductivity, making it essential for printed circuit boards (PCBs), semiconductors, and electrical wiring.
Excellent Undercoating: It is frequently used as a "strike" or base layer for other metals like nickel, silver, or gold because it provides superior adhesion and levels out surface defects.
Corrosion Resistance: While not as strong as nickel, a copper layer acts as a protective barrier against oxidation and environmental wear.
Decorative Appeal: Copper's distinct reddish-brown hue is popular for coins, jewelry, automotive trim, and furniture.
Industrial Utility: Its softness and malleability prevent coatings from cracking if the part is bent after plating, and its natural antibacterial properties are used in medical instruments.