Determinations of hydrogen in ferrous materials by vacuum extraction at 800 degrees C and by vacuum fusion

Abstract

Determinations of hydrogen in a variety of ferrous materials were made by vacuum extraction at 800 0 C and by vacuum fu sion. The warm extraction method has the advantages of rapid operation and relative freedom of the evolved hydrogen from association with other gases. A high hydrogen content produced by h eating in hydrogen at high temperature, or by electrolysis, is unstable at room temperature, but t he hyd rogen contents of commercial steels, after hot working and storage, were low and stable, and without segregation . Steels with high chromium contents dissolve more hydrogen and retain it more tenaciously than do plain carbon or low-alloy steels.

Quantitative Analysis of Hydrogen in High-Hydrogen-Content Material of Magnesium Hydride via Laser-Induced Breakdown Spectroscopy

“…The demand for the quantitative analysis of hydrogen in solid-state substances has recently grown because of the increasing studies on materials related to hydrogen production, transportation, storage, and utilization (e.g., fuel cells, hydrogen storage materials, and structural materials for hydrogen transportation) for the realization of an environmentally friendly society. Several analytical techniques are currently applied for this purpose, including thermal desorption spectroscopy, inert gas or vacuum fusion/gas chromatography, , secondary-ion mass spectrometry (SIMS), , and glow discharge optical emission spectrometry (GD-OES) . However, their application areas are limited; for example, SIMS is limited to trace analysis (ppb–ppm), whereas GD-OES can perform only a rough concentration determination.…”

Determination of Micro Quantities of Hydrogen Combustion-Manometric Method

“…in the properties of high purity uranium as related to hydrogen content has created the need at this laboratory for a suitable method for the determination of hydrogen in the microgram to submicrogram range. Methods that have been used by others for low-range hydrogen analyses include vacuum fusion (1, 4> , 11), warm extraction (6), and lowpressure combustion (5). A method employing a sensitive mercury-oil manometer with a modified Pregl apparatus has also been described (9) for microdeterminations of hydrogen and carbon in organic compounds.…”

Determination of Hydrogen in Titanium and Titanium Alloys

“…Hydrogen has been determined in steels (14,27,40,44,47,58,68), magnesium (9,33), and zirconium (31) by hot vacuum extraction. In this procedure the sample is heated (but not melted) under a vacuum and the resultant gases are analyzed.…”