Studying localized corrosion in stainless steels with surface-sensitive methods

    Research output: Contribution to journalArticleScientificpeer-review

    2 Citations (Scopus)

    Abstract

    Different surface-sensitive techniques have been used to investigate localized corrosion of stainless steels in environments containing thiosulfate, chlorides, and sulfates. Pitting was induced in laboratory by using a scratch technique and electrochemical polarization. The diameter of the pits was less than 0.2mm. The morphology of the pits and the composition of the corrosion product in the pits were studied. The pits on surfaces were investigated directly after the electrochemical tests, on cross sections, and on replicas. The surface-sensitive techniques used provided consistent results with valuable complementary information. The corrosion product in the pits contained high amounts of chromium, and sulfur as sulfides and sulfates. The pit deposit in the molybdenum-alloyed stainless steel contained additionally a high amount of molybdenum. Indications of a very thin chlorine-rich layer next to the parent metal was detected.
    Original languageEnglish
    Pages (from-to)279-289
    JournalMaterials Characterization
    Volume36
    Issue number4-5
    DOIs
    Publication statusPublished - 1996
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Stainless Steel
    stainless steels
    corrosion
    Molybdenum
    Stainless steel
    Corrosion
    Sulfates
    Thiosulfates
    Chlorine
    Sulfides
    Chromium
    Pitting
    Sulfur
    molybdenum
    Chlorides
    sulfates
    Deposits
    Metals
    Polarization
    pitting

    Cite this

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    title = "Studying localized corrosion in stainless steels with surface-sensitive methods",
    abstract = "Different surface-sensitive techniques have been used to investigate localized corrosion of stainless steels in environments containing thiosulfate, chlorides, and sulfates. Pitting was induced in laboratory by using a scratch technique and electrochemical polarization. The diameter of the pits was less than 0.2mm. The morphology of the pits and the composition of the corrosion product in the pits were studied. The pits on surfaces were investigated directly after the electrochemical tests, on cross sections, and on replicas. The surface-sensitive techniques used provided consistent results with valuable complementary information. The corrosion product in the pits contained high amounts of chromium, and sulfur as sulfides and sulfates. The pit deposit in the molybdenum-alloyed stainless steel contained additionally a high amount of molybdenum. Indications of a very thin chlorine-rich layer next to the parent metal was detected.",
    author = "Ulla Ehrnsten and Jari Likonen and Leena Carpen and Outi Varjonen",
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    language = "English",
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    pages = "279--289",
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    Studying localized corrosion in stainless steels with surface-sensitive methods. / Ehrnsten, Ulla; Likonen, Jari; Carpen, Leena; Varjonen, Outi.

    In: Materials Characterization, Vol. 36, No. 4-5, 1996, p. 279-289.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Studying localized corrosion in stainless steels with surface-sensitive methods

    AU - Ehrnsten, Ulla

    AU - Likonen, Jari

    AU - Carpen, Leena

    AU - Varjonen, Outi

    PY - 1996

    Y1 - 1996

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    AB - Different surface-sensitive techniques have been used to investigate localized corrosion of stainless steels in environments containing thiosulfate, chlorides, and sulfates. Pitting was induced in laboratory by using a scratch technique and electrochemical polarization. The diameter of the pits was less than 0.2mm. The morphology of the pits and the composition of the corrosion product in the pits were studied. The pits on surfaces were investigated directly after the electrochemical tests, on cross sections, and on replicas. The surface-sensitive techniques used provided consistent results with valuable complementary information. The corrosion product in the pits contained high amounts of chromium, and sulfur as sulfides and sulfates. The pit deposit in the molybdenum-alloyed stainless steel contained additionally a high amount of molybdenum. Indications of a very thin chlorine-rich layer next to the parent metal was detected.

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