アルゴン送気加熱抽出法による鉄鋼中の水素の定量

抄録

An apparatus for the rapid determination of hydrogen in iron and steel was constructed by applying the argon carrier gas hot extraction technique.
The steel sample was heated at 950°∼1100°C in the stream of argon, purified by passing through hot titanium sponge and P₂O₅.
Hydrogen extracted from the sample was carried into the palladium spiral tube. Here, the whole of the hydrogen diffused into the evacuated part surrounding the palladium spiral and collected by a mercury diffusion pump and an automatic toepler pump in the gas collector connected with a cappirary manometer, by which the amount of hydrogen was determined from the mercury height.
This method was applied for the determination of hydrogen in iron, steel and cast iron, and the hydrogen concentration higher than 0.00001% was determined with good reproducibility within 25 min.