A comparative study of hydrazine alternatives in simulated steam generator conditions—Oxygen reaction kinetics and interaction with carbon steel

Essi Jäppinen; Tiina Ikäläinen; Frej Lindfors; Timo Saario; Konsta Sipilä; Iva Betova; Martin Bojinov

doi:10.1016/j.electacta.2020.137697

A comparative study of hydrazine alternatives in simulated steam generator conditions—Oxygen reaction kinetics and interaction with carbon steel

Essi Jäppinen, Tiina Ikäläinen, Frej Lindfors, Timo Saario, Konsta Sipilä, Iva Betova, Martin Bojinov^* (Corresponding Author)

^*Corresponding author for this work

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

9 Citations (Scopus)

Abstract

The efficiency of a range of hydrazine alternatives (carbohydrazide, diethyl-hydroxylamine, erythorbic acid and 2-butanone oxime) as oxygen scavengers and their interaction with carbon steel in simulated PWR steam generator inlet conditions are quantitatively compared. Kinetic parameters of oxygen reaction are estimated for the first time in such conditions using both an oxygen and a redox sensor. Electrochemical impedance measurements are performed to investigate the effect of studied alternatives on carbon steel corrosion. Using a quantitative interpretation of the impedance data by the Mixed-Conduction Model, the influence of hydrazine and its alternatives on charge transfer reactions at the oxide/solution interface and film growth/dissolution processes are discriminated. Conclusions are drawn on the comparative reaction rates of hydrazine alternatives with respect to oxygen consumption and steel passivation.

Original language	English
Article number	137697
Journal	Electrochimica Acta
Volume	369
Early online date	31 Dec 2020
DOIs	https://doi.org/10.1016/j.electacta.2020.137697
Publication status	Published - 10 Feb 2021
MoE publication type	A1 Journal article-refereed

Keywords

Carbon steel corrosion
hydrazine alternatives
Kinetic analysis
Oxygen reduction
Steam generator

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10.1016/j.electacta.2020.137697

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title = "A comparative study of hydrazine alternatives in simulated steam generator conditions—Oxygen reaction kinetics and interaction with carbon steel",

abstract = "The efficiency of a range of hydrazine alternatives (carbohydrazide, diethyl-hydroxylamine, erythorbic acid and 2-butanone oxime) as oxygen scavengers and their interaction with carbon steel in simulated PWR steam generator inlet conditions are quantitatively compared. Kinetic parameters of oxygen reaction are estimated for the first time in such conditions using both an oxygen and a redox sensor. Electrochemical impedance measurements are performed to investigate the effect of studied alternatives on carbon steel corrosion. Using a quantitative interpretation of the impedance data by the Mixed-Conduction Model, the influence of hydrazine and its alternatives on charge transfer reactions at the oxide/solution interface and film growth/dissolution processes are discriminated. Conclusions are drawn on the comparative reaction rates of hydrazine alternatives with respect to oxygen consumption and steel passivation.",

keywords = "Carbon steel corrosion, hydrazine alternatives, Kinetic analysis, Oxygen reduction, Steam generator",

author = "Essi J{\"a}ppinen and Tiina Ik{\"a}l{\"a}inen and Frej Lindfors and Timo Saario and Konsta Sipil{\"a} and Iva Betova and Martin Bojinov",

note = "Funding Information: The funding of this work by the Finnish Ministry of Economic Affairs and Employment within the frames of the Research Program on Nuclear Power Plant Safety 2019–2022 (SAFIR 2022), Fortum and TVO are gratefully acknowledged. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.electacta.2020.137697",

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T1 - A comparative study of hydrazine alternatives in simulated steam generator conditions—Oxygen reaction kinetics and interaction with carbon steel

AU - Jäppinen, Essi

AU - Ikäläinen, Tiina

AU - Lindfors, Frej

AU - Saario, Timo

AU - Sipilä, Konsta

AU - Betova, Iva

AU - Bojinov, Martin

N1 - Funding Information: The funding of this work by the Finnish Ministry of Economic Affairs and Employment within the frames of the Research Program on Nuclear Power Plant Safety 2019–2022 (SAFIR 2022), Fortum and TVO are gratefully acknowledged. Publisher Copyright: © 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2021/2/10

Y1 - 2021/2/10

N2 - The efficiency of a range of hydrazine alternatives (carbohydrazide, diethyl-hydroxylamine, erythorbic acid and 2-butanone oxime) as oxygen scavengers and their interaction with carbon steel in simulated PWR steam generator inlet conditions are quantitatively compared. Kinetic parameters of oxygen reaction are estimated for the first time in such conditions using both an oxygen and a redox sensor. Electrochemical impedance measurements are performed to investigate the effect of studied alternatives on carbon steel corrosion. Using a quantitative interpretation of the impedance data by the Mixed-Conduction Model, the influence of hydrazine and its alternatives on charge transfer reactions at the oxide/solution interface and film growth/dissolution processes are discriminated. Conclusions are drawn on the comparative reaction rates of hydrazine alternatives with respect to oxygen consumption and steel passivation.

AB - The efficiency of a range of hydrazine alternatives (carbohydrazide, diethyl-hydroxylamine, erythorbic acid and 2-butanone oxime) as oxygen scavengers and their interaction with carbon steel in simulated PWR steam generator inlet conditions are quantitatively compared. Kinetic parameters of oxygen reaction are estimated for the first time in such conditions using both an oxygen and a redox sensor. Electrochemical impedance measurements are performed to investigate the effect of studied alternatives on carbon steel corrosion. Using a quantitative interpretation of the impedance data by the Mixed-Conduction Model, the influence of hydrazine and its alternatives on charge transfer reactions at the oxide/solution interface and film growth/dissolution processes are discriminated. Conclusions are drawn on the comparative reaction rates of hydrazine alternatives with respect to oxygen consumption and steel passivation.

KW - Carbon steel corrosion

KW - hydrazine alternatives

KW - Kinetic analysis

KW - Oxygen reduction

KW - Steam generator

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DO - 10.1016/j.electacta.2020.137697

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SN - 0013-4686

VL - 369

JO - Electrochimica Acta

JF - Electrochimica Acta

M1 - 137697

ER -

A comparative study of hydrazine alternatives in simulated steam generator conditions—Oxygen reaction kinetics and interaction with carbon steel

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