Abstract
It is our aim to measure the consumption-rates of anode and cathode of tungsten arc in air, argon, oxyargon, nitrogen, and chloride.
In order to investigate the behaviors of their consumption-rates in small arc current, our experiments are performed in comparatively wide range of arc current, e.g. 1.3-208amp.
The results are summarized as follows :
1. Below 40A, as the current decreases, the consumption-rates of anode and cathode increase under all of the conditions.
2. The consumption-rate of anode in argon is nearly equal to that in nitrogen, while it is higher in air, oxyargon, and chlorine than that in argon. It seems to be due to the oxide or chloride produced at the hot electrode.
3. The consumption-rates of cathode in various gases are evidently different by the use of the kinds of gases surrounding arcs. It is partly because the gases have their own ionization potentials and partly because oxide or chloride is produced at the surface of cathode.
