Effect of dissolved hydrogen on the electrochemical behaviour of Alloy 600 in simulated PWR primary water at 290°C

Yubing Qiu, Tetsuo Shoji, Zhanpeng Lu

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

With an increase in dissolved hydrogen (DH) content from 0 to 5cm3 STP H2/kg H2O the electrochemical behaviour of Alloy 600 in deaerated PWR primary water at 290°C was investigated, using corrosion potential (Ecorr) monitoring, potentiodynamic polarization, cyclic voltammetry and electrochemical impedance spectroscopy (EIS). DH content controls the Ecorr of Alloy 600. Raising DH content directly promotes the cathodic process and reduces the passivity of Alloy 600 significantly. EIS results show that increasing DH content results in a thinner inner-layer oxide film and ions diffusion becomes easier. The mechanism of these DH effects is discussed.

Original languageEnglish
Pages (from-to)1983-1989
Number of pages7
JournalCorrosion Science
Volume53
Issue number5
DOIs
Publication statusPublished - 2011 May 1

Keywords

  • A. Alloy
  • B. EIS
  • B. Polarization
  • C. High temperature corrosion
  • C. Passivity

ASJC Scopus subject areas

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

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