Accession Number:

ADA094219

Title:

Development and Qualification of Methods for the Determination of Diffusible Hydrogen Contents in Weldments.

Descriptive Note:

Interim technical rept. no. 2, 1 Jul 77-30 Jun 80,

Corporate Author:

RENSSELAER POLYTECHNIC INST TROY N Y

Personal Author(s):

Report Date:

1980-09-15

Pagination or Media Count:

117.0

Abstract:

Because a critical concentration of diffusible hydrogen must be present for hydrogen-induced cracking, it is essential to determine the amount of hydrogen introduced by various welding procedures. This investigation involved the development and qualification of three methods for the determination of diffusible hydrogen content in weldments. 1 A hot-extraction method utilizing a mass spectrometer If a suitable quenching procedure were developed, the mass-spectrometer extraction method could be used to measure the diffusible and total hydrogen contents of weld-metal specimens 2 An electrochemical technique using a modification of the Barnacle Cell The modified Barnacle Cell cannot be used to determine accurately the diffusible hydrogen content in weldments because accurate diffusivity values are not known, or are difficult to determine 3 A silicone-oil extraction method developed at RPI This method is a reliable, rapid and inexpensive technique for the determination of diffusible-hydrogen content in weldments. Author

Subject Categories:

  • Manufacturing and Industrial Engineering and Control of Production Systems
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE