Copper-Coated Welding Wire
A steel wire with a thin copper coating that reduces contact resistance and provides corrosion protection. It promotes even current transfer.
Physicochemical Mechanism of Action
A copper-coated welding wire consists of a steel wire coated with a thin layer of copper. This is done by electrolytic finishing. The copper layer improves electrical conductivity and protects the wire from corrosion.
Metallurgical Relevance & Risks in Welding
The copper layer reduces the contact resistance at the contact tip, leading to improved current transfer. This is especially important in high-performance welding equipment or in environments with high corrosion potential. Without a sufficient copper layer, the contact resistance can increase, leading to current problems and possible contact failure.
Workshop Practice & Instructions
Use copper-coated welding wire in environments with high corrosion potential or with high-performance equipment. Make sure the copper layer is not too thin (at least 0.1 mm). If necessary, you can rebuild the copper layer by further electrolytic finishing.