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Localized corrosion of lean duplex stainless steels in H2S-containing wet atmosphere from urban wastewater treatment units
RISE Research Institutes of Sweden, Materials and Production, Corrosion. (Institut de la Corrosion)ORCID iD: 0000-0001-8721-8560
Veolia, France.
RISE Research Institutes of Sweden, Materials and Production, Corrosion. (Institut de la Corrision)ORCID iD: 0000-0001-5462-2700
RISE Research Institutes of Sweden, Materials and Production, Corrosion. (Institut de la Corrosion)ORCID iD: 0000-0003-4981-7727
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2021 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, no 11, p. 1730-Article in journal (Refereed) Published
Abstract [en]

With lower alloying costs and higher mechanical properties, lean duplex stainless steels can be a good alternative to the more commonly used austenitic stainless steels. A study was initiated to define the limits of the use of lean duplex stainless steels for urban wastewater treatment (WWT) units. This paper gives and discusses the corrosion results in an aerated wet atmosphere containing H2S at different levels. Exposures were performed both at laboratory scale and in the field WWT plant for 1 year. A specific probe was also designed to study the corrosion process below water condensate film contaminated with H2S. Under such conditions, the properties of stainless steel were strongly modified with an enhanced risk of localized corrosion. The results obtained on lean duplex materials (UNS S32101, S32202, and S32304) are compared with austenitic UNS S30403 and UNS S31603 and with the more standard duplexes UNS S82441 and UNS S32205. The results show that lean duplexes can be used in aerated wet atmospheres in case of moderate contamination of H2S (<10 ppm) and chloride (<200 ppm). For higher contaminations (e.g., H2S around 100 ppm/chloride around 1000 ppm) the duplex S32205 should be preferred.

Place, publisher, year, edition, pages
John Wiley and Sons Inc , 2021. no 11, p. 1730-
Keywords [en]
H2S, lean duplex, localized corrosion, stainless steels, wastewater, wet corrosion, Atmospheric corrosion, Austenite, Chlorine compounds, Hydrogen sulfide, Hydrogen sulfide removal (water treatment), Steel corrosion, Wastewater treatment, Alloying costs, Austenitic, Condensate films, Corrosion process, Lean duplex stainless steel, Lean duplexes, Duplex stainless steel
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:ri:diva-54688DOI: 10.1002/maco.202112508Scopus ID: 2-s2.0-85107825521OAI: oai:DiVA.org:ri-54688DiVA, id: diva2:1573978
Note

Funding details: Research Fund for Coal and Steel, RFCS, 749632; Funding text 1: Stéphane Deleris, David Lahache, Jean Francois Mougel, and Catalin Biscu are acknowledged for their help in field exposures in Brussels. Veronique Hocquet, Olivier Colombero, and Paul Sacristan are acknowledged for their help in field exposures in Cap Sicié. This study shows part of the results from a European project supported by the Research Fund for Coal and Steel (RFCS), under the Grant Agreement Number 749632 (2017–2020).

Available from: 2021-06-28 Created: 2021-06-28 Last updated: 2023-05-26Bibliographically approved

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Larché, NicolasThierry, DominiqueDuquesnes, VincentMendibide, Christophe

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