Accession Number : AD0008266

Title :   THERMAL CONDUCTIVITY METHOD FOR ANALYSIS OF HYDROGEN IN STEEL

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s) : SHIELDS,BRUCE M. ; CHIPMAN,JOHN ; GRANT,NICHOLAS J.

Report Date : 30 SEP 1952

Pagination or Media Count : 1

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.

Descriptors :   BRIDGES, CELLS, CELLS(BIOLOGY), CHAMBERS, CIRCULATION, CONDUCTIVITY, FURNACES, GASES, LOW TEMPERATURE, MIXING, STORAGE, THERMAL CONDUCTIVITY, TIME INTERVALS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE