Ennoblement, corrosion, and biofouling in brackish seawater: Comparison between six stainless steel grades

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

In this work, six common stainless steel grades were compared with respect to ennoblement characteristics, corrosion performance and tendency to biofouling in brackish sea water in a pilot-scale cooling water circuit. Two tests were performed, each employing three test materials, until differences between the materials were detected. Open circuit potential (OCP) was measured continuously in situ. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements were conducted before and after the tests. Exposed specimens were further subjected to examinations by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS), and the biofouling was studied using epifluorescence microscopy, quantitative polymerase chain reaction (qPCR) and high-throughput sequencing (HTP sequencing). The results revealed dissimilarities between the stainless steel grades in corrosion behaviour and biofouling tendency. The test material that differed from the most of the other studied alloys was grade EN 1.4162. It experienced fastest and most efficient ennoblement of OCP, its passive area shrank to the greatest extent and the cathodic reaction was accelerated to a significant degree by the development of biofilm. Furthermore, microbiological analyses revealed that bacterial community on EN 1.4162 was dominated by Actinobacteria, whereas on the other five test materials Proteobacteria was the main bacterial phylum.

Original languageEnglish
Pages (from-to)27-42
Number of pages16
JournalBioelectrochemistry
Volume120
DOIs
Publication statusPublished - 1 Apr 2018
MoE publication typeA1 Journal article-refereed

Fingerprint

Biofouling
materials tests
Corrosion
Stainless Steel
Seawater
stainless steels
grade
corrosion
Stainless steel
tendencies
Dielectric Spectroscopy
Networks (circuits)
Proteobacteria
polymerase chain reaction
biofilms
sequencing
liquid cooling
sea water
Actinobacteria
Biofilms

Keywords

  • Biofouling
  • Brackish sea water
  • Electrochemical measurements
  • Ennoblement
  • Microbially induced corrosion (MIC)
  • Stainless steel

Cite this

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title = "Ennoblement, corrosion, and biofouling in brackish seawater: Comparison between six stainless steel grades",
abstract = "In this work, six common stainless steel grades were compared with respect to ennoblement characteristics, corrosion performance and tendency to biofouling in brackish sea water in a pilot-scale cooling water circuit. Two tests were performed, each employing three test materials, until differences between the materials were detected. Open circuit potential (OCP) was measured continuously in situ. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements were conducted before and after the tests. Exposed specimens were further subjected to examinations by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS), and the biofouling was studied using epifluorescence microscopy, quantitative polymerase chain reaction (qPCR) and high-throughput sequencing (HTP sequencing). The results revealed dissimilarities between the stainless steel grades in corrosion behaviour and biofouling tendency. The test material that differed from the most of the other studied alloys was grade EN 1.4162. It experienced fastest and most efficient ennoblement of OCP, its passive area shrank to the greatest extent and the cathodic reaction was accelerated to a significant degree by the development of biofilm. Furthermore, microbiological analyses revealed that bacterial community on EN 1.4162 was dominated by Actinobacteria, whereas on the other five test materials Proteobacteria was the main bacterial phylum.",
keywords = "Biofouling, Brackish sea water, Electrochemical measurements, Ennoblement, Microbially induced corrosion (MIC), Stainless steel",
author = "E. Huttunen-Saarivirta and P. Rajala and M. Marja-aho and J. Maukonen and E. Sohlberg and L. Carp{\'e}n",
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Ennoblement, corrosion, and biofouling in brackish seawater : Comparison between six stainless steel grades. / Huttunen-Saarivirta, E.; Rajala, P.; Marja-aho, M.; Maukonen, J.; Sohlberg, E.; Carpén, L.

In: Bioelectrochemistry, Vol. 120, 01.04.2018, p. 27-42.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Ennoblement, corrosion, and biofouling in brackish seawater

T2 - Comparison between six stainless steel grades

AU - Huttunen-Saarivirta, E.

AU - Rajala, P.

AU - Marja-aho, M.

AU - Maukonen, J.

AU - Sohlberg, E.

AU - Carpén, L.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - In this work, six common stainless steel grades were compared with respect to ennoblement characteristics, corrosion performance and tendency to biofouling in brackish sea water in a pilot-scale cooling water circuit. Two tests were performed, each employing three test materials, until differences between the materials were detected. Open circuit potential (OCP) was measured continuously in situ. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements were conducted before and after the tests. Exposed specimens were further subjected to examinations by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS), and the biofouling was studied using epifluorescence microscopy, quantitative polymerase chain reaction (qPCR) and high-throughput sequencing (HTP sequencing). The results revealed dissimilarities between the stainless steel grades in corrosion behaviour and biofouling tendency. The test material that differed from the most of the other studied alloys was grade EN 1.4162. It experienced fastest and most efficient ennoblement of OCP, its passive area shrank to the greatest extent and the cathodic reaction was accelerated to a significant degree by the development of biofilm. Furthermore, microbiological analyses revealed that bacterial community on EN 1.4162 was dominated by Actinobacteria, whereas on the other five test materials Proteobacteria was the main bacterial phylum.

AB - In this work, six common stainless steel grades were compared with respect to ennoblement characteristics, corrosion performance and tendency to biofouling in brackish sea water in a pilot-scale cooling water circuit. Two tests were performed, each employing three test materials, until differences between the materials were detected. Open circuit potential (OCP) was measured continuously in situ. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements were conducted before and after the tests. Exposed specimens were further subjected to examinations by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS), and the biofouling was studied using epifluorescence microscopy, quantitative polymerase chain reaction (qPCR) and high-throughput sequencing (HTP sequencing). The results revealed dissimilarities between the stainless steel grades in corrosion behaviour and biofouling tendency. The test material that differed from the most of the other studied alloys was grade EN 1.4162. It experienced fastest and most efficient ennoblement of OCP, its passive area shrank to the greatest extent and the cathodic reaction was accelerated to a significant degree by the development of biofilm. Furthermore, microbiological analyses revealed that bacterial community on EN 1.4162 was dominated by Actinobacteria, whereas on the other five test materials Proteobacteria was the main bacterial phylum.

KW - Biofouling

KW - Brackish sea water

KW - Electrochemical measurements

KW - Ennoblement

KW - Microbially induced corrosion (MIC)

KW - Stainless steel

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M3 - Article

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JF - Bioelectrochemistry

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