Which tungsten type is commonly preferred for easier arc starting on DCEN?

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Multiple Choice

Which tungsten type is commonly preferred for easier arc starting on DCEN?

Explanation:
On DCEN, arc starting mainly depends on how readily the electrode tip emits electrons. Thoriated tungsten contains thorium oxide, which lowers the work function and increases electron emission at the tip. That makes it easier to initiate and stabilize the arc when the electrode is negative, so you get a quicker, more reliable strike on DCEN. Pure tungsten lacks those emission-enhancing dopants, so starts are harder. Lanthanated tungsten is also a good, nonradioactive option, but thoriated tungsten is commonly preferred when the goal is the easiest DCEN arc start. Tungsten carbide isn’t suitable for TIG electrodes.

On DCEN, arc starting mainly depends on how readily the electrode tip emits electrons. Thoriated tungsten contains thorium oxide, which lowers the work function and increases electron emission at the tip. That makes it easier to initiate and stabilize the arc when the electrode is negative, so you get a quicker, more reliable strike on DCEN. Pure tungsten lacks those emission-enhancing dopants, so starts are harder. Lanthanated tungsten is also a good, nonradioactive option, but thoriated tungsten is commonly preferred when the goal is the easiest DCEN arc start. Tungsten carbide isn’t suitable for TIG electrodes.

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