When welding aluminum and its alloys, the best use is zirconium tungsten electrode (white) and pure tungsten electrode (green). The zirconium tungsten electrode is doped with zirconia, which can form a stable and regular spherical end under the AC arc, ensuring the uniformity and stability of the arc, greatly improving the welding quality and heat input control, especially suitable for welding reactive metals such as aluminum and magnesium. Pure tungsten electrodes are suitable for AC welding due to their high melting point and good conductivity, and are suitable for low-current aluminum welding operations.
In contrast, tungsten electrodes doped with other elements such as thorium tungsten, cerium tungsten, and lanthanum tungsten are more used for DC welding or welding of metals such as stainless steel and carbon steel. The selection of zirconium tungsten electrodes not only ensures the stability of the welding process but also reduces welding defects, so it is widely used in the field of aluminum welding, especially in industries with high welding quality requirements such as aerospace, automobile manufacturing, and food processing.
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