EWLa-2 designated a tungsten electrode containing 1.8–2.2 wt.-% of dispersed lanthanum oxide (La2O3). The EWLa-2 electrode has the highest volume of oxides of any of the specific single-additive AWS-specified electrodes types, which serves to enhance arc starting and stability, reduce tip erosion rate, and extend operating current range. Lanthanated tungsten electrodes can be used for both dcen and ac applications.
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