The influence of halide ions on the passivity breakdown of carbon steel based on the point defect model

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The influence of halide ions on the passivity breakdown of carbon steel based on the point defect model. / Ghanbari, Elmira; Saatchi, Alireeza; Kovalov, Danyil; Kursten, Bruno; Macdonald, Digby D.

NACE - International Corrosion Conference Series. 2018. ed. NACE International, 2018. p. 1-8 11025.

Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

Harvard

Ghanbari, E, Saatchi, A, Kovalov, D, Kursten, B & Macdonald, DD 2018, The influence of halide ions on the passivity breakdown of carbon steel based on the point defect model. in NACE - International Corrosion Conference Series. 2018 edn, 11025, NACE International, pp. 1-8, 2018 - CORROSION, Phoenix, United States, 2018-04-15.

APA

Ghanbari, E., Saatchi, A., Kovalov, D., Kursten, B., & Macdonald, D. D. (2018). The influence of halide ions on the passivity breakdown of carbon steel based on the point defect model. In NACE - International Corrosion Conference Series (2018 ed., pp. 1-8). [11025] NACE International.

Vancouver

Ghanbari E, Saatchi A, Kovalov D, Kursten B, Macdonald DD. The influence of halide ions on the passivity breakdown of carbon steel based on the point defect model. In NACE - International Corrosion Conference Series. 2018 ed. NACE International. 2018. p. 1-8. 11025

Author

Ghanbari, Elmira ; Saatchi, Alireeza ; Kovalov, Danyil ; Kursten, Bruno ; Macdonald, Digby D. / The influence of halide ions on the passivity breakdown of carbon steel based on the point defect model. NACE - International Corrosion Conference Series. 2018. ed. NACE International, 2018. pp. 1-8

Bibtex - Download

@inproceedings{d82b27e6c38541c1b5f1d9a39402c9ec,
title = "The influence of halide ions on the passivity breakdown of carbon steel based on the point defect model",
abstract = "An important factor in determining the breakdown of the barrier layer of the passive film on carbon steel in halide-containing solutions is the anion size. In this study, the influence of the size of aggressive anions on the passivity breakdown of UNS K02700 grade carbon steel exposed to saturated Ca(OH)2 solutions with the addition of different halides was investigated by using the potentiodynamic polarization (PDP) experiments. The PDP results were interpreted by using a mechanistic description based on the Point Defect Model (PDM). The experimental results revealed a linear dependence of the critical breakdown potential (Ec) on the logarithm of the activity of the breakdown-inducing halide (F-, Cl-, Br-, and I-), as predicted by the PDM. Furthermore, the PDM successfully accounted for the order with which the halides induce passivity breakdown, F- < Cl- > Br- > I-, in terms of competitive Gibbs free energy of anion dehydration and expansion of surface oxygen vacancies, into which the halide must absorb as the initial event in the breakdown process.",
keywords = "Passivity breakdown, Point defect model, Halide ion size",
author = "Elmira Ghanbari and Alireeza Saatchi and Danyil Kovalov and Bruno Kursten and Macdonald, {Digby D.}",
note = "Score=3",
year = "2018",
month = "4",
day = "16",
language = "English",
isbn = "978-151086440-5",
pages = "1--8",
booktitle = "NACE - International Corrosion Conference Series",
publisher = "NACE International",
edition = "2018",

}

RIS - Download

TY - GEN

T1 - The influence of halide ions on the passivity breakdown of carbon steel based on the point defect model

AU - Ghanbari, Elmira

AU - Saatchi, Alireeza

AU - Kovalov, Danyil

AU - Kursten, Bruno

AU - Macdonald, Digby D.

N1 - Score=3

PY - 2018/4/16

Y1 - 2018/4/16

N2 - An important factor in determining the breakdown of the barrier layer of the passive film on carbon steel in halide-containing solutions is the anion size. In this study, the influence of the size of aggressive anions on the passivity breakdown of UNS K02700 grade carbon steel exposed to saturated Ca(OH)2 solutions with the addition of different halides was investigated by using the potentiodynamic polarization (PDP) experiments. The PDP results were interpreted by using a mechanistic description based on the Point Defect Model (PDM). The experimental results revealed a linear dependence of the critical breakdown potential (Ec) on the logarithm of the activity of the breakdown-inducing halide (F-, Cl-, Br-, and I-), as predicted by the PDM. Furthermore, the PDM successfully accounted for the order with which the halides induce passivity breakdown, F- < Cl- > Br- > I-, in terms of competitive Gibbs free energy of anion dehydration and expansion of surface oxygen vacancies, into which the halide must absorb as the initial event in the breakdown process.

AB - An important factor in determining the breakdown of the barrier layer of the passive film on carbon steel in halide-containing solutions is the anion size. In this study, the influence of the size of aggressive anions on the passivity breakdown of UNS K02700 grade carbon steel exposed to saturated Ca(OH)2 solutions with the addition of different halides was investigated by using the potentiodynamic polarization (PDP) experiments. The PDP results were interpreted by using a mechanistic description based on the Point Defect Model (PDM). The experimental results revealed a linear dependence of the critical breakdown potential (Ec) on the logarithm of the activity of the breakdown-inducing halide (F-, Cl-, Br-, and I-), as predicted by the PDM. Furthermore, the PDM successfully accounted for the order with which the halides induce passivity breakdown, F- < Cl- > Br- > I-, in terms of competitive Gibbs free energy of anion dehydration and expansion of surface oxygen vacancies, into which the halide must absorb as the initial event in the breakdown process.

KW - Passivity breakdown

KW - Point defect model

KW - Halide ion size

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/overview/39609604

M3 - In-proceedings paper

SN - 978-151086440-5

SP - 1

EP - 8

BT - NACE - International Corrosion Conference Series

PB - NACE International

ER -

ID: 6893918