Plating and Coating

Zinc coating is widely used to enhance the appearance and protect metals from corrosion. It creates a protective layer that prevents rust from reaching the underlying metal surface and slows down the corrosion process of steel. The coating adheres quickly and builds up rapidly, making it suitable for parts with shallow recesses. Zinc chromate coatings come in various colors, offering good color retention and a shiny finish. In the automotive industry, zinc coating is a cost-effective method for protecting major components. 

Nickel plating is a process of applying a layer of nickel onto a surface using both electrolytic and non-electrolytic methods. It enhances wear resistance, corrosion resistance, and hardness. The nickel-plated surface is bright, white, and shiny, making it ideal for use as a base coat before further metal plating. Nickel plating can be applied using both barrel plating and rack plating techniques. Recent advancements have improved adhesion speed, coating thickness, shine, and the ability to reach intricate recesses. 

Copper plating is a process that enhances flexibility, excellent thermal and electrical conductivity, and provides good corrosion resistance. It also improves surface adhesion for subsequent nickel plating. After applying a copper layer, a thin chromium coating is added to provide effective corrosion resistance. This process not only increases the shine but also reduces the time required for nickel plating. 

Brass plating is a widely used method for coating metal with a brass alloy, valued for its attractive gold-like color, making it popular for jewelry and decorative items. After brass plating, a lacquer coating is typically applied to prevent tarnishing and discoloration. The brass plating process is primarily performed using a solution containing a mixture of copper and zinc.

Electrolytic lacquer coating offers high corrosion resistance and can be applied in various colors, similar to other metals such as brass, copper, and gold, among others. This coating can be applied alone, eliminating the need for additional metal plating. Additionally, electrolytic lacquer has excellent resistance to ultraviolet (UV) radiation, ensuring that the coating does not change color even when exposed to sunlight for extended periods.