學振19小委 第4號 鐵及び鋼水素分析方法(眞空加熱法)

Abstract

Since its foundation, the 19th Sectional Committee of the Japan Society for the Promotion of Scientific Research has endeavored to standardize the methods and devices for analysing gases in iron and steel. Those of analysing methods for nitrogen and oxygen were already published, and recently that for hydrogen was completed. We are very grateful in this occasion to demonstrate it.The analysis for hydrogen may be classified into three processes, viz., 1) vacuum fusion proces, 2) vacuum heating process, and 3) combustion process. After long tedious investigations and discussions in our Committee, we finally arrived at the adoption of the vacuum heating process, referring to the existing situations in this country.The original scheme of the process was proposed by Mr. Sasaburo Kobayasi, and the devices were designed and mainly studied by Prof. Hisayuki Somiya. In the procedure of this process, the sample of 50-100 grams in weight is heated to 800°C for 1-2 hours in a high vacuum furnace (at about 0·1-5 Hg mm). The extracted gases are analysed with Orsat micro gas analysis apparatus. The sensibility of the whole devices reaches surely below 0·01cc of hydrogen gas. CO2 and CH4 contained in gas are also referred to. At present, our steel works, nearly twenty in number, are adopting this process in this country.