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",
year = "1996",
doi = "10.1016/S1044-5803(96)00059-9",
language = "English",
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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

N2 - 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.

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.

U2 - 10.1016/S1044-5803(96)00059-9

DO - 10.1016/S1044-5803(96)00059-9

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JO - Materials Characterization

JF - Materials Characterization

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