Determining factors for anodic polarization curves of typical structural materials of boiling water reactors in high temperature - High purity water

Masahiko Tachibana, Kazushige Ishida, Yoichi Wada, Ryosuke Shimizu, Nobuyuki Ota, Nobuyoshi Hara

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

In order to examine the anodic polarization characteristics of typical structural materials of boiling water reactors (BWRs), the anodic polarization curves of type 316L stainless steel (316L SS) and Alloy 182 were measured in deaerated high purity water at 553 K using the previously reported measurement method which was confirmed suitable for high temperature - high purity water. In order to specify which constituent element determines the dissolution characteristics of these materials, the anodic polarization curves of pure iron, pure nickel, and pure chromium were also surveyed. The anodic polarization curve of 316L SS was determined to have active, passive, and transpassive states which were the same as type 304 SS (304 SS) showed. But, Alloy 182 had different polarization characteristics especially near the corrosion potential as it had no active state. From comparison results of the polarization characteristics of these materials and their constituent elements, the corrosion characteristics of these materials were concluded to be mainly determined by the corrosion characteristics of chromium.

Original languageEnglish
Pages (from-to)253-262
Number of pages10
Journaljournal of nuclear science and technology
Volume49
Issue number2
DOIs
Publication statusPublished - 2012

Keywords

  • Boiling water reactor
  • Electrochemical corrosion potential
  • Nickel-base alloy
  • Polarization curve
  • Stainless steel
  • Stress corrosion cracking
  • Structural material

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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