The Relation among the Potential Hydrogen in Electrode Coatings, the Partial Pressure of Hydrogen in Arc Atmosphere and the Dissolved Hvdrogen in Deposit Metal (Report 2)

Abstract

In the previous paper, the authers reported the results of experiment on the relation among the volume of the potential hydrogen in electrode coatings, the partial pressure of hydrogen in arc atmosphere and the dissolved hydrogen in deposit metal, using 4 kinds of experimental electrodes. And the following conclusions have been obtained;
(1) The more the potential hydrogen in coatings is contained, the more the partial pressure of hydrogen in arc atmosphere and the volumes of the dissolved hydrogen in deposit metal increase, provided same type electrode coatings are used.
(2) When the different types of coatings, for example, limestone type and deoxide type are compared, more partial pressure of hydrogen and the more volume of dissolved hydrogen in deposit metal collected with glycelin method are indicated in the latter case than in the former case, while almost same volume of potential hydrogen in coating is contained in both types. And when potential hydrogen in coating is changed to the hydrogen component in atmosphere by the lime type, it is diluted with CO and CO₂ produced from limestone, while by the deoxide type, its dilution was much less than that by the limestone type.
In this report, anthers used many of commercial electrodes manufactured and used for industrial purposes in Japan, and made experiments by almost same process as these in the previous report, except that process of cellecting method of dissolved hydrogen in deposit metal. The dissolved hydrogen was extracted in mercury at 240°C, 24-48 hr., instead by the glycelin method.
The characteristics of coating were almost same with these shown in report 1.
The results of experiments were almost same with these shown in report 1. The characteristics of coating were distinct only low-hydrogen type was used. When other types were used, their characteristics were not clear, mainly because the compenents of coatings and the volume percent of them were not reported by the manufacturers in public.