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

Konsta Sipilä; Martin Bojinov; Wolfgang Mayinger; Timo Saario; Michael Stanislowski

doi:10.1016/j.electacta.2015.05.137

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

Konsta Sipilä
, Martin Bojinov^*
, Wolfgang Mayinger
, Timo Saario
, Michael Stanislowski

^*Corresponding author for this work

VTT Technical Research Centre of Finland

University of Chemical Technology and Metallurgy
E.ON Kernkraft GmbH

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

17 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 language	English
Pages (from-to)	757-770
Journal	Electrochimica Acta
Volume	173
DOIs	https://doi.org/10.1016/j.electacta.2015.05.137
Publication status	Published - 2015
MoE publication type	A1 Journal article-refereed

Keywords

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

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

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.",

keywords = "low-alloyed steel, high-tempereature water, chloride and sulfate additions, impedance spectroscopy, kinetic model",

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doi = "10.1016/j.electacta.2015.05.137",

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TY - JOUR

T1 - Effect of chloride and sulfate additions on corrosion of low alloy steel in high-temperature water

AU - Sipilä, Konsta

AU - Bojinov, Martin

AU - Mayinger, Wolfgang

AU - Saario, Timo

AU - Stanislowski, Michael

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

KW - low-alloyed steel

KW - high-tempereature water

KW - chloride and sulfate additions

KW - impedance spectroscopy

KW - kinetic model

U2 - 10.1016/j.electacta.2015.05.137

DO - 10.1016/j.electacta.2015.05.137

M3 - Article

SN - 0013-4686

VL - 173

SP - 757

EP - 770

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

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

Abstract

Keywords

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