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Crevice corrosion of stainless steel in tropical seas
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
2017 (English)In: NACE - International Corrosion Conference SeriesVolume 3, 2017, Pages 1982-1993Corrosion Conference and Expo 2017; New Orleans, National Assoc. of Corrosion Engineers International , 2017, Vol. 3, p. 1982-1993Conference paper, Published paper (Refereed)
Abstract [en]

Stainless steels are widely used in seawater for different applications in the oil and gas and desalination industry. In natural seawater, all surfaces will be rapidly covered by microorganisms with the formation of a biofilm, inducing a significant shift in corrosion potential for stainless steel in the noble direction. The other significant effect of the biofilm on stainless steel is the significant increase of the cathodic efficiency (e.g. the cathodic reduction of dissolved oxygen), increasing the rate of propagation of localized corrosion such as pitting and crevice corrosion. Although this phenomenon has been widely studied at temperate and cold seawaters, very little is known in tropical seawater in which bioactivity is expected to be different. Open-circuit potential measurements and measurements of the cathodic efficiency have been performed at different temperatures in temperate and in tropical seas. The study aimed at defining the differences between temperate and tropical sites in terms of electrochemical behavior (e.g. open-circuit potential and cathodic current for oxygen reduction). One of the main differences was found to be the critical temperature for biofilm ennoblement which was different for temperate and tropical seawaters. The results are discussed in terms of risk for crevice corrosion for stainless steels in tropical seas.

Place, publisher, year, edition, pages
National Assoc. of Corrosion Engineers International , 2017. Vol. 3, p. 1982-1993
Keywords [en]
Corrosion, Marine corrosion, Stainless steel, Tropical sea, Biofilms, Desalination, Dissolved oxygen, Efficiency, Electrochemical corrosion, Electrolytic reduction, Reduction, Seawater, Seawater corrosion, Tropics, Corrosion potentials, Critical temperatures, Electrochemical behaviors, Open circuit potential, Open circuit potential measurements, Rate of propagation
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40504Scopus ID: 2-s2.0-85028019764ISBN: 9781510840348 (print)OAI: oai:DiVA.org:ri-40504DiVA, id: diva2:1359973
Conference
NACE - International Corrosion Conference 26 March 2017 through 30 March 2017
Available from: 2019-10-10 Created: 2019-10-10 Last updated: 2019-10-10Bibliographically approved

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