The effects of hydrogen on anodic dissolution and passivation of iron in alkaline solutions

Ahsan Ejaz, Zhanpeng Lu, Junjie Chen, Qian Xiao, Xiangkun Ru, Guangdong Han, Tetsuo Shoji

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Effects of hydrogen on anodic dissolution and passivation of iron in alkaline solutions are investigated by electrochemical measurements on iron, hydrogen-charged iron and catholically pre-cleaned iron using a Devanathan dual cell. Shifting of open circuit state of iron in bicarbonate solutions from passivity to active dissolution and the appearance of active dissolution range for hydrogen-charged iron are primarily caused by the surface cleaning effect. Hydrogen hinders the transition from active dissolution to passivation. Inductive coupled plasma analyses of solutions confirm the enhancing effect of hydrogen on anodic dissolution. The effects of hydrogen and solution compositions on anodic reactions are analyzed.

Original languageEnglish
Pages (from-to)165-181
Number of pages17
JournalCorrosion Science
Volume101
DOIs
Publication statusPublished - 2015 Dec

Keywords

  • A. Iron
  • B. Hydrogen permeation
  • B. ICO-OES
  • B. Polarization
  • C. Anodic dissolution
  • C. Passivity

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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