Effect of chloride and sulfate additions on corrosion of low alloy steel in high-temperature water

Konsta Sipilä, Martin Bojinov (Corresponding Author), Wolfgang Mayinger, Timo Saario, Michael Stanislowski

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

The present paper investigates the effect of chloride and sulfate additions on corrosion of low-alloyed steel in a cladding flaw of a nuclear reactor pressure vessel using in-situ electrochemical impedance spectroscopy coupled to ex-situ characterization of the oxides by surface analytical techniques. Impedance data are interpreted by the mixed-conduction model for oxide films to yield estimates for the main kinetic and transport parameters of the corrosion process. It can be concluded that the effect of chloride/sulfate transients on low-alloyed steel oxides is moderate, concerns mostly the processes at the inner layer/coolant interface and is to a certain extent reversible.
Original languageEnglish
Pages (from-to)757-770
JournalElectrochimica Acta
Volume173
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Keywords

  • low-alloyed steel
  • high-tempereature water
  • chloride and sulfate additions
  • impedance spectroscopy
  • kinetic model

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