Effects of ammonium thiocyanate and pH of aqueous solutions on hydrogen absorption into iron under cathodic polarization

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

To evaluate the susceptibility of steels to hydrogen embrittlement, it must be hydrogen charged and have its hydrogen content controlled before any mechanical testing. In this study, hydrogen permeation tests of an iron sheet were performed during potentiostatic hydrogen charging in various solutions containing ammonium thiocyanate to obtain a guideline for efficient hydrogen charging for a wide range of hydrogen contents. As the polarization potential shifted in the negative direction, the hydrogen permeation current increased before becoming almost constant. In all cases, besides when an aqueous sodium hydroxide solution was employed, the hydrogen permeation current increased due to the addition of ammonium thiocyanate. The effect of adding ammonium thiocyanate was enhanced as the aqueous solution pH was decreased. The hydrogen permeation current under various hydrogen charging conditions obtained in this study can be used as a reference for hydrogen charging of steels.

Original languageEnglish
Pages (from-to)1209-1214
Number of pages6
JournalIsij International
Volume61
Issue number4
DOIs
Publication statusPublished - 2021

Keywords

  • Ammonium thiocyanate
  • Hydrogen absorption
  • PH
  • Pure iron

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'Effects of ammonium thiocyanate and pH of aqueous solutions on hydrogen absorption into iron under cathodic polarization'. Together they form a unique fingerprint.

Cite this