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

Iva Betova; Martin Bojinov; Tiina Ikäläinen; Timo Saario; Konsta Sipilä

doi:10.1149/1945-7111/ac4f26

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

Iva Betova
, Martin Bojinov^*
, Tiina Ikäläinen
, Timo Saario
, Konsta Sipilä

^*Corresponding author for this work

BA4509 Advanced materials for nuclear energy

Bulgarian Academy of Sciences
University of Chemical Technology and Metallurgy

Research output: Contribution to journal › Article › Scientific › peer-review

13 Citations (Scopus)

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 language	English
Article number	021502
Number of pages	10
Journal	Journal of the Electrochemical Society
Volume	169
Issue number	2
DOIs	https://doi.org/10.1149/1945-7111/ac4f26
Publication status	Published - 9 Feb 2022
MoE publication type	A1 Journal article-refereed

Funding

The funding of this work by the SAFIR 2022 Finnish Research Program on Nuclear Power Plant Safety (2019-2022) is gratefully acknowledged.

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10.1149/1945-7111/ac4f26

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

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. ",

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AU - Betova, Iva

AU - Bojinov, Martin

AU - Ikäläinen, Tiina

AU - Saario, Timo

AU - Sipilä, Konsta

PY - 2022/2/9

Y1 - 2022/2/9

N2 - 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.

AB - 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.

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ER -

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

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