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Corrosion Resistance of Cast Duplex Steels

P. Müller V. Pernica V. Kaňa

Archives of Foundry Engineering | 2022 | vol. 22 | No 3 | 5-10 | DOI: 10.24425/afe.2022.140230

Keywords Cast duplex steel Pitting resistance equivalent number Ferric chloride Critical pitting temperature Mechanical properties

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Abstract

The aim of this work is to investigate the resistance of cast duplex (austenitic-ferritic) steels to pitting corrosion with respect to the value of PREN (Pitting Resistance Equivalent Number). Pitting corrosion is one of the most common types of corrosion of stainless steels. In most cases, it is caused by the penetration of aggressive anions through the protective passive layer of the steel, and after its disruption, it leads to subsurface propagation of corrosion. The motivation for the research was a severe pitting corrosion attack on the blades of the gypsum-calcium water mixer in a thermal power plant operation.
In order to examine the corrosion resistance, 4 samples of 1.4517 steel with different concentrations of alloying elements (within the interval indicated by the steel grade) and thus with a different PREN value were cast. The corrosion resistance of the samples was evaluated by the ASTM G48 – 11 corrosion test in a 6% aqueous FeCl3 solution at room and elevated solution temperatures. To verify the possible effect of different alloying element concentrations on the mechanical properties, the research was supplemented by tensile and Charpy impact tests. Based on the results, it was found that a significant factor in the resistance of duplex steels to pitting corrosion is the temperature of the solution. For the components in operation, it is therefore necessary to take this effect into account and thoroughly control and manage the temperature of the environment in which the components operate.

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Bibliography

[1] Reardon, A. (2011). 12.5 Duplex Stainless Steels. In metallurgy for the non-metallurgist (2nd Edition). Ohio: ASM International, ISBN 978-1-61503-821-3, Retrieved from https://app.knovel.com/hotlink/pdf/id:kt009JBTT4/metallurgy-non-metallurgist/duplex-stainless-steels
[2] McGuire, M.F. (2008). Duplex stainless steels. in stainless steels for design engineers (91–108) [online]. Materials Park, Ohio 44073-000: ASM International, [cit. 2020-05-19]. ISBN 978-1-61503-059-0., Retrieved from: https://app.knovel.com/hotlink/pdf/id:kt008GRPY2/stainless-steels-design/duplex-stainless-introduction
[3] O'Brien, A. ed. (2011) Stainless and Heat-Resistant Steels. In Welding Handbook, Volume 4 - Materials and Applications, Part 1 [online]. 9th Edition. Miami: American Welding Society (AWS), p. 351 [cit. 2020-05-27]. ISBN 978-1-61344-537-2. Retrieved from https://app.knovel.com/hotlink/pdf/id:kt0095SGE2/welding-handbook-volume/duplex-sta-composition
[4] Revie, R.W. ed. (2011). In Uhlig’s Corrosion Handbook [online]. Third edition. Duplex stainless steels. (695–705). Hoboken, New Jersey: John Wiley & Sons, 2011 [cit. 2020-06-14]. ISBN 978-1-61344-161-9. Retrieved from https://app.knovel.com/hotlink/pdf/id:kt008TZY32/uhlig-s-corrosion-handbook/duplex-sta-history
[5] Prošek, T. & Šefl, V. (2018). Corrosion resistance of stainless steel in drinking water treatment plants and water storage units. Koroze a ochrana materialu. 62(4), 141-147. DOI: 10.2478/kom-2018-0020.
[6] Cicek, V. (2014). Corrosion engineering. Hoboken, New Jersey: Scrivener Publishing/Wiley. ISBN 978-1-118-72089-9. Retrieved from https://app.knovel.com/hotlink/toc/id:kpCE00004B/corrosion-engineering/corrosion-engineering.
[7] Marcus, P. ed. (2012). Corrosion mechanisms in theory and practice. Third edition. Boca Raton: CRC Press, Corrosion technology (Boca Raton, Fla.). ISBN 978-1-4200-9463-3.
[8] G48 - 11(2015). Standard test methods for pitting and crevice corrosion resistance of stainless steels and related alloys by use of ferric chloride solution. West Conshohocken: ASTM International, 2015.
[9] Jargelius-Pettersson, R.F.A. (1998). Application of the pitting resistance equivalent concept to some highly alloyed austenitic stainless steels. Corrosion. 54(2), 162-168. DOI: 10.5006/1.3284840.
[10] (2015). Austenitic-ferritic (duplex) casting materials [online]. Otto Junker, 2015 [cit. 2020-06-25]. Retrieved from: https://www.otto-junker.com/cache/dl-Austenitic-Ferritic-DUPLEX-Casting-Materials-aa4d1dd1db00d37343728c6ba0598a75.pdf

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P. Müller

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V. Pernica

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V. Kaňa

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Brno University of Technology, Czech Republic

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Corrosion Resistance of Cast Duplex Steels

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