Impact of biological factors on the ennoblement of stainless steel in Baltic seawater

Katri Mattila, Leena Carpén, Laura Raaska, Hanna-Leena Alakomi, Tero Hakkarainen, Mirja Salkinoja-Salonen

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

Open circuit potentials of stainless steels increased when immersed in the Baltic Sea. The ennoblement potential was +200 mVsce in 40 to 50 days when sea water temperature was below 52°C and +300–400 mVsce within <40 days at around 102°C. Ennoblement occurred in a laboratory ecosystem at 232°C in 20 to 30 days, and at 262°C in <20 days, but no ennoblement occurred at A322°C within 40 days. By the time the ennoblement was complete, compact microcolonies covered 1–10% of the steel surface. Nutrient enrichment of Baltic Sea water by twofold above the natural levels increased microbial growth but attenuated open circuit potential increase of the stainless steels. Exposure of the ennobled stainless steels to similar levels of nutrients did not reverse the already developed open circuit potentials. Attenuation of the ennobling response of the stainless steels by increases of temperature and eutrophication suggests a role for microorganisms which is crucial for the electrochemical behaviour of steels in brackish Baltic Sea water
Original languageEnglish
Pages (from-to)410-420
JournalJournal of industrial microbiology and biotechnology
Volume24
Issue number6
DOIs
Publication statusPublished - 2000
MoE publication typeA1 Journal article-refereed

Fingerprint

Stainless Steel
Seawater
Biological Factors
Stainless steel
Steel
Nutrients
Water
Networks (circuits)
Eutrophication
Food
Temperature
Oceans and Seas
Microorganisms
Ecosystems
Ecosystem
Growth

Keywords

  • biofilm
  • stainless steel
  • ennoblement
  • Baltic Sea
  • season
  • laboratory ecosystem

Cite this

Mattila, Katri ; Carpén, Leena ; Raaska, Laura ; Alakomi, Hanna-Leena ; Hakkarainen, Tero ; Salkinoja-Salonen, Mirja. / Impact of biological factors on the ennoblement of stainless steel in Baltic seawater. In: Journal of industrial microbiology and biotechnology. 2000 ; Vol. 24, No. 6. pp. 410-420.
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abstract = "Open circuit potentials of stainless steels increased when immersed in the Baltic Sea. The ennoblement potential was +200 mVsce in 40 to 50 days when sea water temperature was below 52°C and +300–400 mVsce within <40 days at around 102°C. Ennoblement occurred in a laboratory ecosystem at 232°C in 20 to 30 days, and at 262°C in <20 days, but no ennoblement occurred at A322°C within 40 days. By the time the ennoblement was complete, compact microcolonies covered 1–10{\%} of the steel surface. Nutrient enrichment of Baltic Sea water by twofold above the natural levels increased microbial growth but attenuated open circuit potential increase of the stainless steels. Exposure of the ennobled stainless steels to similar levels of nutrients did not reverse the already developed open circuit potentials. Attenuation of the ennobling response of the stainless steels by increases of temperature and eutrophication suggests a role for microorganisms which is crucial for the electrochemical behaviour of steels in brackish Baltic Sea water",
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Impact of biological factors on the ennoblement of stainless steel in Baltic seawater. / Mattila, Katri; Carpén, Leena; Raaska, Laura; Alakomi, Hanna-Leena; Hakkarainen, Tero; Salkinoja-Salonen, Mirja.

In: Journal of industrial microbiology and biotechnology, Vol. 24, No. 6, 2000, p. 410-420.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Impact of biological factors on the ennoblement of stainless steel in Baltic seawater

AU - Mattila, Katri

AU - Carpén, Leena

AU - Raaska, Laura

AU - Alakomi, Hanna-Leena

AU - Hakkarainen, Tero

AU - Salkinoja-Salonen, Mirja

PY - 2000

Y1 - 2000

N2 - Open circuit potentials of stainless steels increased when immersed in the Baltic Sea. The ennoblement potential was +200 mVsce in 40 to 50 days when sea water temperature was below 52°C and +300–400 mVsce within <40 days at around 102°C. Ennoblement occurred in a laboratory ecosystem at 232°C in 20 to 30 days, and at 262°C in <20 days, but no ennoblement occurred at A322°C within 40 days. By the time the ennoblement was complete, compact microcolonies covered 1–10% of the steel surface. Nutrient enrichment of Baltic Sea water by twofold above the natural levels increased microbial growth but attenuated open circuit potential increase of the stainless steels. Exposure of the ennobled stainless steels to similar levels of nutrients did not reverse the already developed open circuit potentials. Attenuation of the ennobling response of the stainless steels by increases of temperature and eutrophication suggests a role for microorganisms which is crucial for the electrochemical behaviour of steels in brackish Baltic Sea water

AB - Open circuit potentials of stainless steels increased when immersed in the Baltic Sea. The ennoblement potential was +200 mVsce in 40 to 50 days when sea water temperature was below 52°C and +300–400 mVsce within <40 days at around 102°C. Ennoblement occurred in a laboratory ecosystem at 232°C in 20 to 30 days, and at 262°C in <20 days, but no ennoblement occurred at A322°C within 40 days. By the time the ennoblement was complete, compact microcolonies covered 1–10% of the steel surface. Nutrient enrichment of Baltic Sea water by twofold above the natural levels increased microbial growth but attenuated open circuit potential increase of the stainless steels. Exposure of the ennobled stainless steels to similar levels of nutrients did not reverse the already developed open circuit potentials. Attenuation of the ennobling response of the stainless steels by increases of temperature and eutrophication suggests a role for microorganisms which is crucial for the electrochemical behaviour of steels in brackish Baltic Sea water

KW - biofilm

KW - stainless steel

KW - ennoblement

KW - Baltic Sea

KW - season

KW - laboratory ecosystem

U2 - 10.1038/sj.jim.7000001

DO - 10.1038/sj.jim.7000001

M3 - Article

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