Corrosion of Alloy 690 in Simulated Steam Generator Crevices: Effect of Applied Potential, pH and Pb Addition

Iva Betova, Martin Bojinov (Corresponding Author), Tiina Ikäläinen, Timo Saario, Konsta Sipilä

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The mechanism of general corrosion of Alloy 690 in simulated steam generator crevices is investigated by voltammetry, electrochemical impedance spectroscopy and slow strain rate tests, combined with ex-situ characterization of the oxides using Xray photoelectron and Glow-discharge optical emission spectroscopies. Quantitative interpretation of impedance spectra with the Mixed-Conduction Model furnishes estimates of kinetic and transport parameters of the corrosion and anodic oxidation processes. The results indicate a beneficial effect of Pb addition on general corrosion regardless of crevice solution composition.

Original languageEnglish
Article number021502
Number of pages10
JournalJournal of the Electrochemical Society
Volume169
Issue number2
DOIs
Publication statusPublished - 9 Feb 2022
MoE publication typeA1 Journal article-refereed

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