ELECTROCHEMICAL ASPECTS OF HYDROGEN PERMEATION IN IRON AT HIGH HYDROSTATIC PRESSURE.

Abstract

A high pressure system containing an electrochemical method for continuous hydrogen permeation determination through metal foil is described for use at hydrostatic pressures up to 20,000 psi. The diffusion coefficient of hydrogen in Armco iron at 21C is 0.000043 sq cm/sec, unaffected by pressure up to 6200 psi; the solubility of hydrogen in Armco iron is a linear function of pressure up to a value of 7.8 x 10 to the minus 7th power mol H2/cc Fe at 6200 psi, 21C, and does not follow Sieverts' law behavior. By linking the hydrogen permeation current caused by cathodic charging with that caused by applied pressure, an overpotential-pressure relationship is obtained. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1969
Accession Number
AD0696992

Entities

People

  • John J. Deluccia
  • Koji Yamakawa
  • Leonard Nanis

Organizations

  • University of Pennsylvania

Tags

DTIC Thesaurus Topics

  • Coefficients
  • Corrosion
  • Diffusion
  • Diffusion Coefficient
  • Embrittlement
  • High Pressure
  • Hydrogen
  • Hydrogen Embrittlement
  • Hydrostatic Pressure
  • Material Degradation Processes
  • Solubility

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Plasma Physics.