NEW RAPID MFTHOD FOR DETERMINATION OF GASEOUS CONTENTS IN IRON AND STEEL (I)
Hydrogenmeter
1956 Volume 42 Issue 8 Pages 669-673
Details
1956 Volume 42 Issue 8 Pages 669-673
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, N2 and H2. As CO and N2 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 fordealing 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 thismethod were of the order of only a few %, and necessary minimum quantities of gases were 0.006cc-0.01cc.
