Stainless steel pitting in chloride-sulfate solutions: The role of cations

Pekka Pohjanne, Leena Carpén, Petri Kinnunen, J. Rämö, A. Sarpola, M. Riihimäki, T. Hakkarainen

    Research output: Contribution to conferenceConference articleScientificpeer-review

    Abstract

    Chlorides and sulfates are the most important ions while considering the possibility of pitting corrosion of stainless steel. It is generally accepted that the risk of pitting increases with increasing chloride concentration and decreases with increasing sulfate concentration. There are also indications that higher sulfate/chloride ionic ratio is needed to inhibit the pitting corrosion of stainless steels at higher chloride concentrations. However, the role of cations in the pitting event has gained only a little attention. In this study the pitting behavior of stainless steel type AISI 304 (EN 1.4301) has been studied in various binary mixtures of MgSO4, K2SO4 or Li2SO4 with NaCl. Results are compared to those obtained in binary mixtures of Na2SO4 with NaCl as well as in plain NaCl.
    Original languageEnglish
    Pages071981-0719813
    Publication statusPublished - 2007

    Fingerprint

    Pitting
    Stainless steel
    Positive ions
    Binary mixtures
    Corrosion
    Sulfates
    Ions

    Keywords

    • stainless steel
    • pitting
    • pitting corrosion
    • chlorides
    • sulfates

    Cite this

    Pohjanne, P., Carpén, L., Kinnunen, P., Rämö, J., Sarpola, A., Riihimäki, M., & Hakkarainen, T. (2007). Stainless steel pitting in chloride-sulfate solutions: The role of cations. 071981-0719813.
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    abstract = "Chlorides and sulfates are the most important ions while considering the possibility of pitting corrosion of stainless steel. It is generally accepted that the risk of pitting increases with increasing chloride concentration and decreases with increasing sulfate concentration. There are also indications that higher sulfate/chloride ionic ratio is needed to inhibit the pitting corrosion of stainless steels at higher chloride concentrations. However, the role of cations in the pitting event has gained only a little attention. In this study the pitting behavior of stainless steel type AISI 304 (EN 1.4301) has been studied in various binary mixtures of MgSO4, K2SO4 or Li2SO4 with NaCl. Results are compared to those obtained in binary mixtures of Na2SO4 with NaCl as well as in plain NaCl.",
    keywords = "stainless steel, pitting, pitting corrosion, chlorides, sulfates",
    author = "Pekka Pohjanne and Leena Carp{\'e}n and Petri Kinnunen and J. R{\"a}m{\"o} and A. Sarpola and M. Riihim{\"a}ki and T. Hakkarainen",
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    Pohjanne, P, Carpén, L, Kinnunen, P, Rämö, J, Sarpola, A, Riihimäki, M & Hakkarainen, T 2007, 'Stainless steel pitting in chloride-sulfate solutions: The role of cations', pp. 071981-0719813.

    Stainless steel pitting in chloride-sulfate solutions : The role of cations. / Pohjanne, Pekka; Carpén, Leena; Kinnunen, Petri; Rämö, J.; Sarpola, A.; Riihimäki, M.; Hakkarainen, T.

    2007. 071981-0719813.

    Research output: Contribution to conferenceConference articleScientificpeer-review

    TY - CONF

    T1 - Stainless steel pitting in chloride-sulfate solutions

    T2 - The role of cations

    AU - Pohjanne, Pekka

    AU - Carpén, Leena

    AU - Kinnunen, Petri

    AU - Rämö, J.

    AU - Sarpola, A.

    AU - Riihimäki, M.

    AU - Hakkarainen, T.

    N1 - CA2: TK202

    PY - 2007

    Y1 - 2007

    N2 - Chlorides and sulfates are the most important ions while considering the possibility of pitting corrosion of stainless steel. It is generally accepted that the risk of pitting increases with increasing chloride concentration and decreases with increasing sulfate concentration. There are also indications that higher sulfate/chloride ionic ratio is needed to inhibit the pitting corrosion of stainless steels at higher chloride concentrations. However, the role of cations in the pitting event has gained only a little attention. In this study the pitting behavior of stainless steel type AISI 304 (EN 1.4301) has been studied in various binary mixtures of MgSO4, K2SO4 or Li2SO4 with NaCl. Results are compared to those obtained in binary mixtures of Na2SO4 with NaCl as well as in plain NaCl.

    AB - Chlorides and sulfates are the most important ions while considering the possibility of pitting corrosion of stainless steel. It is generally accepted that the risk of pitting increases with increasing chloride concentration and decreases with increasing sulfate concentration. There are also indications that higher sulfate/chloride ionic ratio is needed to inhibit the pitting corrosion of stainless steels at higher chloride concentrations. However, the role of cations in the pitting event has gained only a little attention. In this study the pitting behavior of stainless steel type AISI 304 (EN 1.4301) has been studied in various binary mixtures of MgSO4, K2SO4 or Li2SO4 with NaCl. Results are compared to those obtained in binary mixtures of Na2SO4 with NaCl as well as in plain NaCl.

    KW - stainless steel

    KW - pitting

    KW - pitting corrosion

    KW - chlorides

    KW - sulfates

    M3 - Conference article

    SP - 71981

    EP - 719813

    ER -