There are certain differences in arc starting voltage between different types of tungsten electrodes, which are mainly related to the composition of the electrode material and the physical characteristics of the electrode head. Specifically:
Pure Tungsten Electrode
The arcing voltage is relatively high, and the arcing performance is poor, especially in DC welding, which is prone to arcing difficulties, but it performs better in AC welding (such as aluminum welding).
Thorium Tungsten Electrode
It is widely used in DC welding, especially stainless steel and carbon steel, due to its low arcing voltage, easy arcing, and good arc stability.
Cerium Tungsten Electrode
It has low arcing voltage and excellent arcing performance, making it suitable for low-current welding and precision welding.
Lanthanum Tungsten Electrode
It has excellent arcing performance, low arcing voltage and stable arcing, and is suitable for automatic welding and a variety of welding occasions.
Zirconium Tungsten Electrode
The arcing voltage is moderate, suitable for AC welding, especially aluminum and magnesium alloy welding.
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