Based on the main oxide that is utilised and how much of the entire electrode mass it makes up, tungsten electrodes are categorised according to their chemical compositions. To make things easier, each distinct tungsten electrod has been given a unique code and colour.
When welding with alternating current (AC), pure Tungsten Electrode offer exceptional stability; however, they can also be utilised with direct current (DC) and argon or helium shielding gas. They are often less expensive, have a smaller current carrying capability, and are less resistant to contamination from welds. Due to its ability to keep a neat, balled end, EWP electrodes are typically employed to weld magnesium and aluminium. They are often utilised in less important applications, nevertheless, where a small amount of tungsten contamination in the weld pool is acceptable.