Development of a Pre-Treatment Procedure for the Determination of Trace Amount of Bulk Oxygen in Iron and Steel

Abstract

Subject classification: 68.35.Dv; S1.1For the determination of trace amounts of oxygen in iron and steel, a pre-treatment procedure was developed using glow discharge. This permits to remove surface oxygen contaminations, which cannot be eliminated by conventional pre-treatment methods such as electropolishing. The analytical values of oxygen obtained after the glow discharge pre-treatment were approximately 1-2 mg/g lower than those without pre-treatment. This difference is consistent with the oxygen surface contamination determined by surface analysis and charged particle activation analysis.

Simultaneous Analysis of Soluble and Insoluble Oxygen Contents in Steel Specimens Using Inert Gas Fusion Infrared Absorptiometry

“…It generates an oxide film, which is thought to be iron oxide. [1][2][3][4] When a steel is subject to analyze for its O content, a small specimen is prepared from the steel: sampled from liquid state of the steel or cut from solidified state of the steel. Analysis of O content in metal may be made by wet-chemical analysis 5) or radio-chemical analysis.…”

“…6,7) For quick and easy analysis for the O content in steel specimen, combustion method either in vacuum or in inert gas atmosphere has been frequently used. [2][3][4][5][8][9][10][11][12][13] In these days, the combustion method under He gas as an inert gas has been extensively used. Its principle is discussed in Sec.…”