THERMAL CONDUCTIVITY METHOD FOR ANALYSIS OF HYDROGEN IN STEEL
Abstract
The low temperature, vacuum tin-fusion method of analysis for H , developed by Carney, Chipman, and Grant (Trans. Am. Inst. Mining Met. Engrs. 188:397, 1950) was modified to permit the analysis of the evolved gases for H by means of a thermal conductivity cell. The CuO furnace, the freeze-out traps, and the gas circulating equipment were replaced by a conductivity cell, a single-cell conductivity bridge, and a mixing chamber. A properly prepared metal sample can be analyzed in 10 min with a probable error of + or - 0.12 ppm. A study of H-sample storage showed that samples were safely held in a dry ice-acetone bath for 6 days. Storage in liquid N is necessary for longer periods of time.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1952
- Accession Number
- AD0008266
Entities
People
- Bruce M. Shields
- John Chipman
- Nicholas J. Grant
Organizations
- Massachusetts Institute of Technology