Influence of activated carbon on crevice corrosion in adsorption tower of advanced liquid processing system

Yoshikazu Maeda, Hiroshi Abe, Yutaka Watanabe

Research output: Contribution to journalArticle

Abstract

The adsorption tower made of type 316L stainless steel (SS) in Multi-nuclide Removal Equipment (Advanced Liquid Processing System) which uses Ag-impregnated activated carbon (Ag AC) as an adsorbent experienced crevice corrosion. The influence of Ag AC on the crevice corrosion susceptibility and Esp of 316L SS was investigated by performing electrochemical experiments. Crevice corrosion was observed in the specimen in contact with the Ag AC. On the other hand, there was no crevice corrosion without the Ag AC in both pH 7.4 and pH 12 solutions. Clear ennoblement of spontaneous potential (Esp) by in contact with activated carbon was observed and that was clearly higher than the repassivation potential for crevice corrosion (ER,CREV). Thus, the presence of the AC notably increased Esp of 316L SS and this resulted in increased crevice corrosion susceptibility by the galvanic effect. This paper is part of a supplementary issue from the 17th Asia-Pacific Corrosion Control Conference (APCCC-17).

Original languageEnglish
Pages (from-to)39-43
Number of pages5
JournalCorrosion Engineering Science and Technology
Volume53
DOIs
Publication statusPublished - 2018 Mar 13

Keywords

  • 316L stainless steel
  • Crevice corrosion
  • activated carbon
  • corrosion potential

ASJC Scopus subject areas

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

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