The impact of tungsten electrode pollution on welds is mainly reflected in the following aspects:
First, pollution can cause arc instability. If the tungsten electrode head is contaminated with oil, oxide or welding slag, it will cause the arc to trip, flash or arc offset, resulting in uneven heat input during the welding process and difficult to maintain stable welding conditions.
Secondly, pollution is easy to cause “tungsten inclusion” defects. Impurities and contaminants may be brought into the weld pool by the arc, forming tungsten particles mixed in the weld, reducing the mechanical properties and corrosion resistance of the weld and affecting the overall quality of the weld.
In addition, the appearance of the weld will also be affected. When the arc is unstable or severely polluted, defects such as porosity, cracks, or weld nodules may appear on the weld surface, reducing the welding aesthetics and sealing performance.
Finally, contamination can also increase welding spatter, pollute the working environment, and may accelerate the ablation of the electrode, shorten its service life, and indirectly increase production costs.
Therefore, keeping the tungsten electrode clean and avoiding contamination is a key step to ensure weld quality and weld stability.
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