Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions
The corrosion behavior of austenitic Fe–Mn–Al–Cr–C twinning-induced plasticity (TWIP) and microband-induced plasticity (MBIP) steels with different alloying elements ranging from 22.6–30 wt.% Mn, 5.2–8.5 wt.% Al, 3.1–5.1 wt.% Cr, to 0.68–1.0 wt.% C was studied in 3.5 wt.% NaCl (pH 7) and 10 wt.% NaO...
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| Online Access: | https://www.mdpi.com/1996-1944/14/2/425 |
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| author | Juan Bosch Ulises Martin Willian Aperador José M. Bastidas Jacob Ress David M. Bastidas |
| author_facet | Juan Bosch Ulises Martin Willian Aperador José M. Bastidas Jacob Ress David M. Bastidas |
| author_sort | Juan Bosch |
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| description | The corrosion behavior of austenitic Fe–Mn–Al–Cr–C twinning-induced plasticity (TWIP) and microband-induced plasticity (MBIP) steels with different alloying elements ranging from 22.6–30 wt.% Mn, 5.2–8.5 wt.% Al, 3.1–5.1 wt.% Cr, to 0.68–1.0 wt.% C was studied in 3.5 wt.% NaCl (pH 7) and 10 wt.% NaOH (pH 14) solutions. The results obtained using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques, alongside optical microscopy analysis, revealed pitting as the dominant corrosion mechanism in high-Mn TWIP steels. An X-ray diffraction analysis of the surface revealed that the main corrosion products were hematite (Fe<sub>2</sub>O<sub>3</sub>), braunite (Mn<sub>2</sub>O<sub>3</sub>), and hausmannite (Mn<sub>3</sub>O<sub>4</sub>), and binary oxide spinels were also identified, such as galaxite (MnAl<sub>2</sub>O<sub>4</sub>) and jacobsite (MnFe<sub>2</sub>O<sub>4</sub>). This is due to the higher dissolution rate of Fe and Mn, which present a more active redox potential. In addition, a protective Al<sub>2</sub>O<sub>3</sub> passive film was also revealed, showing enhanced corrosion protection. The highest corrosion susceptibility in both electrolytes was exhibited by the MBIP steel (30 wt.% Mn). Pitting corrosion was observed in both chloride and alkaline solutions. |
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| last_indexed | 2024-03-09T04:33:53Z |
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| series | Materials |
| spelling | doaj.art-581f76e4b1614075848e36f538d8c04e2023-12-03T13:31:02ZengMDPI AGMaterials1996-19442021-01-0114242510.3390/ma14020425Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH SolutionsJuan Bosch0Ulises Martin1Willian Aperador2José M. Bastidas3Jacob Ress4David M. Bastidas5Department Chemical, Biomolecular, and Corrosion Engineering, National Center for Education and Research on Corrosion and Materials Performance, NCERCAMP-UA, The University of Akron, 302 E Buchtel Ave, Akron, OH 44325-3906, USADepartment Chemical, Biomolecular, and Corrosion Engineering, National Center for Education and Research on Corrosion and Materials Performance, NCERCAMP-UA, The University of Akron, 302 E Buchtel Ave, Akron, OH 44325-3906, USADepartment of Engineering, Universidad Militar Nueva Granada, Carrera 11 No. 101-80, Bogota 6343200, ColombiaNational Center for Metallurgical Research (CENIM), CSIC, Ave. Gregorio del Amo 8, 28040 Madrid, SpainDepartment Chemical, Biomolecular, and Corrosion Engineering, National Center for Education and Research on Corrosion and Materials Performance, NCERCAMP-UA, The University of Akron, 302 E Buchtel Ave, Akron, OH 44325-3906, USADepartment Chemical, Biomolecular, and Corrosion Engineering, National Center for Education and Research on Corrosion and Materials Performance, NCERCAMP-UA, The University of Akron, 302 E Buchtel Ave, Akron, OH 44325-3906, USAThe corrosion behavior of austenitic Fe–Mn–Al–Cr–C twinning-induced plasticity (TWIP) and microband-induced plasticity (MBIP) steels with different alloying elements ranging from 22.6–30 wt.% Mn, 5.2–8.5 wt.% Al, 3.1–5.1 wt.% Cr, to 0.68–1.0 wt.% C was studied in 3.5 wt.% NaCl (pH 7) and 10 wt.% NaOH (pH 14) solutions. The results obtained using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques, alongside optical microscopy analysis, revealed pitting as the dominant corrosion mechanism in high-Mn TWIP steels. An X-ray diffraction analysis of the surface revealed that the main corrosion products were hematite (Fe<sub>2</sub>O<sub>3</sub>), braunite (Mn<sub>2</sub>O<sub>3</sub>), and hausmannite (Mn<sub>3</sub>O<sub>4</sub>), and binary oxide spinels were also identified, such as galaxite (MnAl<sub>2</sub>O<sub>4</sub>) and jacobsite (MnFe<sub>2</sub>O<sub>4</sub>). This is due to the higher dissolution rate of Fe and Mn, which present a more active redox potential. In addition, a protective Al<sub>2</sub>O<sub>3</sub> passive film was also revealed, showing enhanced corrosion protection. The highest corrosion susceptibility in both electrolytes was exhibited by the MBIP steel (30 wt.% Mn). Pitting corrosion was observed in both chloride and alkaline solutions.https://www.mdpi.com/1996-1944/14/2/425high-Mn TWIP steelpitting corrosionchloridesalkalineelectrochemical impedance spectroscopyinterfacial capacitance |
| spellingShingle | Juan Bosch Ulises Martin Willian Aperador José M. Bastidas Jacob Ress David M. Bastidas Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions Materials high-Mn TWIP steel pitting corrosion chlorides alkaline electrochemical impedance spectroscopy interfacial capacitance |
| title | Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions |
| title_full | Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions |
| title_fullStr | Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions |
| title_full_unstemmed | Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions |
| title_short | Corrosion Behavior of High-Mn Austenitic Fe–Mn–Al–Cr–C Steels in NaCl and NaOH Solutions |
| title_sort | corrosion behavior of high mn austenitic fe mn al cr c steels in nacl and naoh solutions |
| topic | high-Mn TWIP steel pitting corrosion chlorides alkaline electrochemical impedance spectroscopy interfacial capacitance |
| url | https://www.mdpi.com/1996-1944/14/2/425 |
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