Effect of Grain Size on the Corrosion Behavior of Fe-3wt.%Si-1wt.%Al Electrical Steels in Pure Water Saturated with CO<sub>2</sub>
The corrosion behavior of two silicon steels with the same chemical composition but different grains sizes (i.e., average grain area of 115.6 and 4265.9 µm<sup>2</sup>) was investigated by metallographic microscope, gravimetric, electrochemical and surface analysis techniques. The gravim...
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MDPI AG
2021-09-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/17/5084 |
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| author | Gaetano Palumbo Dawid Dunikowski Roma Wirecka Tomasz Mazur Urszula Lelek-Borkowska Kinga Wawer Jacek Banaś |
| author_facet | Gaetano Palumbo Dawid Dunikowski Roma Wirecka Tomasz Mazur Urszula Lelek-Borkowska Kinga Wawer Jacek Banaś |
| author_sort | Gaetano Palumbo |
| collection | DOAJ |
| description | The corrosion behavior of two silicon steels with the same chemical composition but different grains sizes (i.e., average grain area of 115.6 and 4265.9 µm<sup>2</sup>) was investigated by metallographic microscope, gravimetric, electrochemical and surface analysis techniques. The gravimetric and electrochemical results showed that the corrosion rate increased with decreasing the grain size. The scanning electron microscopy/energy dispersive x-ray spectroscopy and X-ray photoelectron spectroscopyanalyses revealed formation of a more homogeneous and compact corrosion product layer on the coarse-grained steel compared to fine-grained material. The Volta potential analysis, carried out on both steels, revealed formation of micro-galvanic sites at the grain boundaries and triple junctions. The results indicated that the decrease in corrosion resistance in the fine-grained steel could be attributed to the higher density of grain boundaries (e.g., a higher number of active sites and defects) brought by the refinement. The higher density of active sites at grain boundaries promote the metal dissolution of the and decreased the stability of the corrosion product layerformed on the metal surface. |
| first_indexed | 2024-03-10T08:08:11Z |
| format | Article |
| id | doaj.art-c497bd7e1d7349a79eb8a71d325029e0 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T08:08:11Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-c497bd7e1d7349a79eb8a71d325029e02023-11-22T10:56:07ZengMDPI AGMaterials1996-19442021-09-011417508410.3390/ma14175084Effect of Grain Size on the Corrosion Behavior of Fe-3wt.%Si-1wt.%Al Electrical Steels in Pure Water Saturated with CO<sub>2</sub>Gaetano Palumbo0Dawid Dunikowski1Roma Wirecka2Tomasz Mazur3Urszula Lelek-Borkowska4Kinga Wawer5Jacek Banaś6Faculty of Foundry Engineering, Department of Chemistry and Corrosion of Metals, AGH University of Science and Technology, Mickiewicza St. 30, 30-059 Krakow, PolandFaculty of Foundry Engineering, Department of Chemistry and Corrosion of Metals, AGH University of Science and Technology, Mickiewicza St. 30, 30-059 Krakow, PolandAcademic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Mickiewicza St. 30, 30-059 Kraków, PolandAcademic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Mickiewicza St. 30, 30-059 Kraków, PolandFaculty of Foundry Engineering, Department of Chemistry and Corrosion of Metals, AGH University of Science and Technology, Mickiewicza St. 30, 30-059 Krakow, PolandŁukasiewicz Research Network–Institute of Aviation, Al. Krakowska 110/114, 02-256 Warsaw, PolandFaculty of Foundry Engineering, Department of Chemistry and Corrosion of Metals, AGH University of Science and Technology, Mickiewicza St. 30, 30-059 Krakow, PolandThe corrosion behavior of two silicon steels with the same chemical composition but different grains sizes (i.e., average grain area of 115.6 and 4265.9 µm<sup>2</sup>) was investigated by metallographic microscope, gravimetric, electrochemical and surface analysis techniques. The gravimetric and electrochemical results showed that the corrosion rate increased with decreasing the grain size. The scanning electron microscopy/energy dispersive x-ray spectroscopy and X-ray photoelectron spectroscopyanalyses revealed formation of a more homogeneous and compact corrosion product layer on the coarse-grained steel compared to fine-grained material. The Volta potential analysis, carried out on both steels, revealed formation of micro-galvanic sites at the grain boundaries and triple junctions. The results indicated that the decrease in corrosion resistance in the fine-grained steel could be attributed to the higher density of grain boundaries (e.g., a higher number of active sites and defects) brought by the refinement. The higher density of active sites at grain boundaries promote the metal dissolution of the and decreased the stability of the corrosion product layerformed on the metal surface.https://www.mdpi.com/1996-1944/14/17/5084silicon steelelectrical steelgrain sizeelectrochemical corrosioncarbon dioxideAM-KPFM Volta potential measurements |
| spellingShingle | Gaetano Palumbo Dawid Dunikowski Roma Wirecka Tomasz Mazur Urszula Lelek-Borkowska Kinga Wawer Jacek Banaś Effect of Grain Size on the Corrosion Behavior of Fe-3wt.%Si-1wt.%Al Electrical Steels in Pure Water Saturated with CO<sub>2</sub> Materials silicon steel electrical steel grain size electrochemical corrosion carbon dioxide AM-KPFM Volta potential measurements |
| title | Effect of Grain Size on the Corrosion Behavior of Fe-3wt.%Si-1wt.%Al Electrical Steels in Pure Water Saturated with CO<sub>2</sub> |
| title_full | Effect of Grain Size on the Corrosion Behavior of Fe-3wt.%Si-1wt.%Al Electrical Steels in Pure Water Saturated with CO<sub>2</sub> |
| title_fullStr | Effect of Grain Size on the Corrosion Behavior of Fe-3wt.%Si-1wt.%Al Electrical Steels in Pure Water Saturated with CO<sub>2</sub> |
| title_full_unstemmed | Effect of Grain Size on the Corrosion Behavior of Fe-3wt.%Si-1wt.%Al Electrical Steels in Pure Water Saturated with CO<sub>2</sub> |
| title_short | Effect of Grain Size on the Corrosion Behavior of Fe-3wt.%Si-1wt.%Al Electrical Steels in Pure Water Saturated with CO<sub>2</sub> |
| title_sort | effect of grain size on the corrosion behavior of fe 3wt si 1wt al electrical steels in pure water saturated with co sub 2 sub |
| topic | silicon steel electrical steel grain size electrochemical corrosion carbon dioxide AM-KPFM Volta potential measurements |
| url | https://www.mdpi.com/1996-1944/14/17/5084 |
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