The copper rod is named for its purple-red color. It has good electrical conductivity, thermal conductivity, corrosion resistance and processing properties, and can be welded and brazed.

Uses

The copper rod is much more widely used than pure iron. Every year, 50% of copper is electrolytically purified into pure copper for use in the electrical industry. The copper mentioned here must be very pure, with a copper content of more than 99.95%. A very small amount of impurities, especially phosphorus, arsenic, aluminum, etc., will greatly reduce the conductivity of copper. The oxygen content in copper (a small amount of oxygen is easily mixed in during copper smelting) has a great influence on the conductivity. Copper used in the electrical industry must generally be oxygen-free copper. In addition, impurities such as lead, antimony, and bismuth will prevent the crystals of copper from combining together, causing hot brittleness, and will also affect the processing of pure copper. This kind of pure copper with high purity is generally refined by electrolysis: impure copper (i.e. crude copper) is used as the anode, pure copper is used as the cathode, and copper sulfate solution is used as the electrolyte. When the current passes through, the impure copper on the anode gradually melts, and the pure copper gradually precipitates on the cathode. The copper refined in this way can reach a purity of 99.99%.

Red copper is a relatively pure type of copper, which can generally be considered as pure copper. It has good conductivity and plasticity, but poor strength and hardness.

Characteristics: high purity, fine structure, and extremely low oxygen content. No pores, sand holes, looseness, excellent conductivity, high precision of the mold surface after electro-etching, and no directionality of the electrode after heat treatment, which is suitable for precision and fine beating, and has good thermoelectric properties, processability, ductility, corrosion resistance and weather resistance.