Tungsten electrodes are used when arc welding
with the Tungsten Inert gas (TIG) process or when plasma welding. In both
processes the electrode, arc and weld pool are protected from atmospheric
contamination by an inert gas. A tungsten electrode is used because it can
withstand very high temperatures with minimal melting or erosion.
Tungsten electrodes are made by powder
metallurgy and are formed to size after sintering.
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