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

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)

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Document Details

Document Type
Technical Report
Publication Date
Sep 15, 1980
Accession Number
ADA094219

Entities

People

  • E. F. Nippes
  • W. F. Savage

Organizations

  • Rensselaer Polytechnic Institute

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Accuracy
  • Base Metal
  • Chemistry
  • Composite Materials
  • Electrodes
  • Geometry
  • Hydrogen
  • Mass Spectrometers
  • Materials
  • Measurement
  • Mechanical Properties
  • Metals
  • Partial Pressure
  • Steel
  • Vacuum
  • Welding
  • Welds

Fields of Study

  • Materials science

Readers

  • Analytical Chemistry
  • Materials Science and Engineering.
  • Metallurgy