迅速鉄鋼ガス定量法 (I) : 水素計

概要

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In this paper, the apparatus for determination of hydrogen contents are described. The authors succeeded in to shorten the time to determine the gaseous contents in iron and steel. It took about 15∿25 minutes. The principles of this new "Hydrogenmeter" are as follows. In vacuum extraction method with graphite crucible, the gases to be obtained were limited to CO, N_2 and H_2. As CO and N_2 are isosteric molecules, so hydrogen contents were easily and exactly determined by measuring the difference of their thermal conductivities. The authors found that the glass-covered thermisters with high electric resistance were enough to attain the above mentioned aim. The best method for dealing with the thermister were determined, using it as bridge arms, and the conditions to obtain a simple calibration equation were given theoretically ; thus the errors of this method were of the order of only a few %, and necessary minimum quantities of gases were 0.006cc∿0.01cc.
社団法人日本鉄鋼協会の論文
1956-08-01