The color code of tungsten electrodes is primarily used to distinguish between different types of tungsten electrode materials, with each color representing different alloy compositions and their applicable scope and performance characteristics. Common color coding and their meanings are as follows:
Green: Pure Tungsten
It is suitable for AC welding, especially aluminum and magnesium alloy welding. It is characterized by the fact that the electrode ends are prone to spheroidization and arc stability.
Red: Thoriated Tungsten
Contains 2%-4% thorium oxide, excellent arcing performance, arc stability, suitable for DC welding and general industrial applications. Due to the radioactive nature of thorium, safety should be paid attention to when using it.
Gray: Ceriated Tungsten
Contains 1.5%-2% cerium oxide, easy arcing, suitable for low-current DC welding, often used for thin plates and fine welding.
Black or gold: Lanthanated Tungsten
Contains 1%-2% lanthanum oxide, compatible with DC and AC welding, stable arc and long life, widely used in automatic welding.
Whaite: Zirconiated Tungsten
Contains about 0.8%-1.2% zirconia, suitable for AC welding, especially aluminum alloy welding, with good end spheroidization.
Purple: Rare Earth Tungsten
Contains a variety of rare earth elements, excellent comprehensive performance, suitable for high-end welding equipment and special welding requirements.
These color codes help welders quickly identify electrode types, select the most suitable electrode to match different welding processes and materials, and improve welding efficiency and quality.
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