Copper plating allows the surface treatment of many different types of metal surfaces. In addition, copper is in some cases a necessary undercoat for proper adhesion. Copper is used in significant quantities in the printed circuit board industry, as an RF coating in telecommunication parts and as an additional corrosion protection in nickel-chromium parts. The coating is able to prevent the different pieces from sticking or cold welding. In addition, copper plating in an acid bath smoothes scratches and machining marks.
Pinnoitus Helin Oy’s copper plating solutions
- Type of bath: alkaline cyanide-free
- Copper plating as a drum and pendant treatment
- Maximum piece dimensions: 2700x900x250 mm
- Materials to be coated: aluminium, copper, steel and their alloys
Copper plating is typically carried out using a separate copper plating bath. The appropriate type of bath is chosen according to the application. Cyanide-type baths, which still comply with BAT recommendations, are perhaps the most used, but not the best. These can be partly replaced by alkaline cyanide-free seedbeds, which reduce environmental damage. The acid bath is still the most popular for its properties. However, it is not directly suitable for all materials. Applications also impose their own requirements when choosing the type of bath.
Standards
- Standard Specification for Electrodeposited Copper for Engineering Uses (ASTM B734 – 97)
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