Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 410-420 |
| Journal | Journal of industrial microbiology and biotechnology |
| Volume | 24 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2000 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- biofilm
- stainless steel
- ennoblement
- Baltic Sea
- season
- laboratory ecosystem
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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 journal › Article › Scientific › peer-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
VL - 24
SP - 410
EP - 420
JO - Journal of industrial microbiology and biotechnology
JF - Journal of industrial microbiology and biotechnology
SN - 1367-5435
IS - 6
ER -