Effect of molybdate anion addition on repassivation of corroding crevice in austenitic stainless steel

Shun Watanabe, Tomohiro Sekiguchi, Hiroshi Abe, Yutaka Watanabe

研究成果: Conference contribution

抄録

In Japan, light water reactors are built on the seacoast because they use seawater as the final heatsink. Leakage of seawater from the condenser section of the reactor could lead to contamination of the reactor coolant, and stainless steels can be susceptible to crevice corrosion in chloride-contaminated water. Therefore, it is necessary to develop counter measures for suppressing the initiation of crevice corrosion and for repassivating the corroding crevice to maintain structural reliability. To accomplish this, first the effect of molybdate anion on suppressing the initiation of crevice corrosion on 316L stainless steel in chloride-contaminated water was evaluated by potentiostatic immersion tests. Next, the effect of molybdate anion addition on the repassivation of corroding crevices was also evaluated through potentiostatic immersion tests as a function of the concentration of chloride anion. Based on the results of these examinations, the beneficial effects of the presence of molybdate anion on the suppression of initiation and propagation of crevice corrosion were quantitatively evaluated in terms of critical potentials.

本文言語English
ホスト出版物のタイトルMinerals, Metals and Materials Series
出版社Springer International Publishing
ページ1157-1168
ページ数12
ISBN(印刷版)9783030046385, 9783030046392, 9783319515403, 9783319651354, 9783319728520, 9783319950211
DOI
出版ステータスPublished - 2019 1 1
イベント18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019 - Boston, United States
継続期間: 2019 8 182019 8 22

出版物シリーズ

名前Minerals, Metals and Materials Series
ISSN(印刷版)2367-1181
ISSN(電子版)2367-1696

Conference

Conference18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019
国/地域United States
CityBoston
Period19/8/1819/8/22

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • エネルギー工学および電力技術
  • 材料力学
  • 金属および合金
  • 材料化学

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