Corrosion Resistance of Cast Duplex Steels
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 ca...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2022-08-01
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| Series: | Archives of Foundry Engineering |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/123845/PDF/AFE%203_2022_01%20Issue%203_2022.pdf |
| _version_ | 1797804162790981632 |
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| author | P. Müller V. Pernica V. Kaňa |
| author_facet | P. Müller V. Pernica V. Kaňa |
| author_sort | P. Müller |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-13T05:33:02Z |
| format | Article |
| id | doaj.art-edff2b0441854a6ebdacab0f9c9da7d6 |
| institution | Directory Open Access Journal |
| issn | 2299-2944 |
| language | English |
| last_indexed | 2024-03-13T05:33:02Z |
| publishDate | 2022-08-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Foundry Engineering |
| spelling | doaj.art-edff2b0441854a6ebdacab0f9c9da7d62023-06-14T15:23:09ZengPolish Academy of SciencesArchives of Foundry Engineering2299-29442022-08-01vol. 22No 3510https://doi.org/10.24425/afe.2022.140230Corrosion Resistance of Cast Duplex SteelsP. Müller0https://orcid.org/0000-0002-3141-6776V. Pernica1https://orcid.org/0000-0002-1025-4579V. Kaňa2https://orcid.org/0000-0003-4870-1749Brno University of Technology, Czech RepublicBrno University of Technology, Czech RepublicBrno University of Technology, Czech RepublicThe 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.https://journals.pan.pl/Content/123845/PDF/AFE%203_2022_01%20Issue%203_2022.pdfcast duplex steelpitting resistance equivalent numberferric chloridecritical pitting temperaturemechanical properties |
| spellingShingle | P. Müller V. Pernica V. Kaňa Corrosion Resistance of Cast Duplex Steels Archives of Foundry Engineering cast duplex steel pitting resistance equivalent number ferric chloride critical pitting temperature mechanical properties |
| title | Corrosion Resistance of Cast Duplex Steels |
| title_full | Corrosion Resistance of Cast Duplex Steels |
| title_fullStr | Corrosion Resistance of Cast Duplex Steels |
| title_full_unstemmed | Corrosion Resistance of Cast Duplex Steels |
| title_short | Corrosion Resistance of Cast Duplex Steels |
| title_sort | corrosion resistance of cast duplex steels |
| topic | cast duplex steel pitting resistance equivalent number ferric chloride critical pitting temperature mechanical properties |
| url | https://journals.pan.pl/Content/123845/PDF/AFE%203_2022_01%20Issue%203_2022.pdf |
| work_keys_str_mv | AT pmuller corrosionresistanceofcastduplexsteels AT vpernica corrosionresistanceofcastduplexsteels AT vkana corrosionresistanceofcastduplexsteels |