Hydrogen entry behavior into iron and steel under atmospheric corrosion

Songjie Li, Eiji Akiyama, Tadashi Shinohara, Kazumi Matsuoka, Wataru Oshikawa

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Electrochemical hydrogen permeation tests of pure Fe sheets rusted by cyclic corrosion test (CCT) and atmospheric exposure were carried out under controlled temperature and humidity to investigate the influence of atmospheric corrosion on the hydrogen entry behavior. The hydrogen entry into the Fe specimens rusted by CCT increased under wet condition, and the hydrogen entry was increased with the CCT cycle number. During drying process after the wetting, hydrogen entry was further enhanced and a peak of hydrogen current was observed. The peak hydrogen permeation current tended to increase with the growth of rust layer, and the peak value of the hydrogen permeation current became remarkably higher than that at the highest humidity when the rust layer was relatively thick. Similar enhancement of hydrogen entry into an outdoor-exposed specimen was also observed during drying. Drying process after CCT resulted in an increase in hydrogen content of 5 mm-thick steel specimens measured by means of thermal desorption analysis, indicating the enhancement of hydrogen entry during drying process and showing a good agreement with the electrochemical hydrogen permeation test results. It is required to take into consideration the enhanced hydrogen entry to estimate concentration of hydrogen from the environment.

Original languageEnglish
Pages (from-to)1062-1069
Number of pages8
JournalIsij International
Volume53
Issue number6
DOIs
Publication statusPublished - 2013 Aug 15
Externally publishedYes

Keywords

  • Atmospheric corrosion
  • Corrosion
  • Delayed fracture
  • Electrochemical hydrogen permeation test
  • Hydrogen embrittlement
  • Thermal desorption analysis

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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