The Influences of Oxygen upon the Consumption rates of Iron, Copper, Aluminum, and Nickel Cathodes in Arc

Abstract

For the purpose of investigating the influence of oxygen upon the characteristics of consumption of cathode in arc, some experiments have been carried out concerning iron, copper, aluminum, and nickel in oxyargon.
The results are summarized as follows :
1) The apparatus including the flow-meter and mixer of gas, which makes it possible to introduce the small quantity of oxygen (0.1-20%) into argon, has been designed.
2) The consumption-rate of iron has the minimum value in the vicinity of 10% oxygen in argon.
3) The consumption-rate of copper has also the minimum value in the range of 2-10% oxgen in argon.
4) The consumption-rates of nickel and aluminum decrease with the increase of oxygen in argon.
5) The maximum value of consumption-rate of nickel, which corresponds to the minimum value of melting-point at 0.22% of oxygen in argon, could be detected.
(6 According to the standard-diagrams of equilibrium-state of metal-oxygen, the analysis have been made about the characteristics of consumption-rate of cathode in arc.