Influence of the electrolyte composition and temperature on the transpassive dissolution of austenitic stainless steels in simulated bleaching solutions

Iva Betova, Martin Bojinov, Petri Kinnunen, Pekka Pohjanne, Timo Saario

    Research output: Contribution to journalArticleScientificpeer-review

    20 Citations (Scopus)

    Abstract

    The transpassive corrosion of highly alloyed austenitic stainless steels UNS N08904, UNS S31254 and UNS S32654 was investigated at 20 and 70 °C in a range of simulated bleaching solutions with conventional and rotating ring-disc electrode voltammetry, as well as electrochemical impedance spectroscopy. The overall transpassive oxidation rate of UNS S32654 was found to be much higher than that of the other two alloys. The general features of the impedance spectra demonstrate that transpassive dissolution is favoured for UNS S32654 and secondary passivation predominates for the two other steels. The addition of oxalic acid resulted in a significant increase of the transpassive oxidation rate at both temperatures. At room temperature, the addition of diethylenetriaminopentaacetic acid (DTPA) led to a decrease of the transpassive oxidation rate, especially at pH 3. Conversely, the addition of DTPA to the pH 3 solution at 70 °C has been found to increase the transpassive oxidation rate. A kinetic model of the process is proposed, featuring a two-step transpassive dissolution of Cr via a Cr(VI) intermediate species and taking into account the dissolution of Fe(III) through the anodic film. The model has been found to be in quantitative agreement with the steady-state current versus potential curves and the impedance spectra. The kinetic parameters of transpassive dissolution have been determined and the relevance of their values is discussed.
    Original languageEnglish
    Pages (from-to)3335-3349
    JournalElectrochimica Acta
    Volume47
    Issue number20
    DOIs
    Publication statusPublished - 2002
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Austenitic stainless steel
    Bleaching
    Electrolytes
    Dissolution
    Oxidation
    Chemical analysis
    Oxalic Acid
    Temperature
    Acids
    Oxalic acid
    Steel
    Voltammetry
    Electrochemical impedance spectroscopy
    Kinetic parameters
    Passivation
    Corrosion
    Electrodes
    Kinetics

    Keywords

    • stainless steel
    • transpassivity
    • simulated bleaching solution
    • electrochemical impedance spectroscopy
    • rotating ring-disc voltammetry
    • kinetic model

    Cite this

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    title = "Influence of the electrolyte composition and temperature on the transpassive dissolution of austenitic stainless steels in simulated bleaching solutions",
    abstract = "The transpassive corrosion of highly alloyed austenitic stainless steels UNS N08904, UNS S31254 and UNS S32654 was investigated at 20 and 70 °C in a range of simulated bleaching solutions with conventional and rotating ring-disc electrode voltammetry, as well as electrochemical impedance spectroscopy. The overall transpassive oxidation rate of UNS S32654 was found to be much higher than that of the other two alloys. The general features of the impedance spectra demonstrate that transpassive dissolution is favoured for UNS S32654 and secondary passivation predominates for the two other steels. The addition of oxalic acid resulted in a significant increase of the transpassive oxidation rate at both temperatures. At room temperature, the addition of diethylenetriaminopentaacetic acid (DTPA) led to a decrease of the transpassive oxidation rate, especially at pH 3. Conversely, the addition of DTPA to the pH 3 solution at 70 °C has been found to increase the transpassive oxidation rate. A kinetic model of the process is proposed, featuring a two-step transpassive dissolution of Cr via a Cr(VI) intermediate species and taking into account the dissolution of Fe(III) through the anodic film. The model has been found to be in quantitative agreement with the steady-state current versus potential curves and the impedance spectra. The kinetic parameters of transpassive dissolution have been determined and the relevance of their values is discussed.",
    keywords = "stainless steel, transpassivity, simulated bleaching solution, electrochemical impedance spectroscopy, rotating ring-disc voltammetry, kinetic model",
    author = "Iva Betova and Martin Bojinov and Petri Kinnunen and Pekka Pohjanne and Timo Saario",
    year = "2002",
    doi = "10.1016/S0013-4686(02)00271-2",
    language = "English",
    volume = "47",
    pages = "3335--3349",
    journal = "Electrochimica Acta",
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    Influence of the electrolyte composition and temperature on the transpassive dissolution of austenitic stainless steels in simulated bleaching solutions. / Betova, Iva; Bojinov, Martin; Kinnunen, Petri; Pohjanne, Pekka; Saario, Timo.

    In: Electrochimica Acta, Vol. 47, No. 20, 2002, p. 3335-3349.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Influence of the electrolyte composition and temperature on the transpassive dissolution of austenitic stainless steels in simulated bleaching solutions

    AU - Betova, Iva

    AU - Bojinov, Martin

    AU - Kinnunen, Petri

    AU - Pohjanne, Pekka

    AU - Saario, Timo

    PY - 2002

    Y1 - 2002

    N2 - The transpassive corrosion of highly alloyed austenitic stainless steels UNS N08904, UNS S31254 and UNS S32654 was investigated at 20 and 70 °C in a range of simulated bleaching solutions with conventional and rotating ring-disc electrode voltammetry, as well as electrochemical impedance spectroscopy. The overall transpassive oxidation rate of UNS S32654 was found to be much higher than that of the other two alloys. The general features of the impedance spectra demonstrate that transpassive dissolution is favoured for UNS S32654 and secondary passivation predominates for the two other steels. The addition of oxalic acid resulted in a significant increase of the transpassive oxidation rate at both temperatures. At room temperature, the addition of diethylenetriaminopentaacetic acid (DTPA) led to a decrease of the transpassive oxidation rate, especially at pH 3. Conversely, the addition of DTPA to the pH 3 solution at 70 °C has been found to increase the transpassive oxidation rate. A kinetic model of the process is proposed, featuring a two-step transpassive dissolution of Cr via a Cr(VI) intermediate species and taking into account the dissolution of Fe(III) through the anodic film. The model has been found to be in quantitative agreement with the steady-state current versus potential curves and the impedance spectra. The kinetic parameters of transpassive dissolution have been determined and the relevance of their values is discussed.

    AB - The transpassive corrosion of highly alloyed austenitic stainless steels UNS N08904, UNS S31254 and UNS S32654 was investigated at 20 and 70 °C in a range of simulated bleaching solutions with conventional and rotating ring-disc electrode voltammetry, as well as electrochemical impedance spectroscopy. The overall transpassive oxidation rate of UNS S32654 was found to be much higher than that of the other two alloys. The general features of the impedance spectra demonstrate that transpassive dissolution is favoured for UNS S32654 and secondary passivation predominates for the two other steels. The addition of oxalic acid resulted in a significant increase of the transpassive oxidation rate at both temperatures. At room temperature, the addition of diethylenetriaminopentaacetic acid (DTPA) led to a decrease of the transpassive oxidation rate, especially at pH 3. Conversely, the addition of DTPA to the pH 3 solution at 70 °C has been found to increase the transpassive oxidation rate. A kinetic model of the process is proposed, featuring a two-step transpassive dissolution of Cr via a Cr(VI) intermediate species and taking into account the dissolution of Fe(III) through the anodic film. The model has been found to be in quantitative agreement with the steady-state current versus potential curves and the impedance spectra. The kinetic parameters of transpassive dissolution have been determined and the relevance of their values is discussed.

    KW - stainless steel

    KW - transpassivity

    KW - simulated bleaching solution

    KW - electrochemical impedance spectroscopy

    KW - rotating ring-disc voltammetry

    KW - kinetic model

    U2 - 10.1016/S0013-4686(02)00271-2

    DO - 10.1016/S0013-4686(02)00271-2

    M3 - Article

    VL - 47

    SP - 3335

    EP - 3349

    JO - Electrochimica Acta

    JF - Electrochimica Acta

    SN - 0013-4686

    IS - 20

    ER -