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Effect of Molybdenum Content on the Corrosion and Microstructure of Low-Ni, Co-Free Maraging Steels. METALS 2021. [DOI: 10.3390/met11060852] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Molybdenum (Mo) is an important alloying element in maraging steels. In this study, we altered the Mo concentration during the production of four cobalt-free maraging steels using an electroslag refining process. The microstructure of the four forged maraging steels was evaluated to examine phase contents by optical microscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD) analysis. Additionally, we assessed the corrosion resistance of the newly developed alloys in 3.5% NaCl solution and 1 M H2SO4 solution through potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Furthermore, we performed SEM and energy-dispersive spectroscopy (EDS) analysis after corrosion to assess changes in microstructure and Raman spectroscopy to identify the presence of phases on the electrode surface. The microstructural analysis shows that the formation of retained austenite increases with increasing Mo concentrations. It is found from corrosion study that increasing Mo concentration up to 4.6% increased the corrosion resistance of the steel. However, further increase in Mo concentration reduces the corrosion resistance.
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Cerra Florez MA, Pereira ÚC, Cardoso JL, dos Santos Oliveira FJ, Araújo WS, Ribas GF, de Abreu HFG, Gomes da Silva MJ. Microstructural characterization of grade 300 and grade 350 maraging steels and electrochemical study in hydrofluoric solution. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2021.109738] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Samide A, Tutunaru B, Cioateră N, Vladu AC, Spinu C, Tigae C. Catalytic Activity of Thallium on Electrochemical Degradation of Metronidazole from Aqueous Solutions. CHEM ENG COMMUN 2016. [DOI: 10.1080/00986445.2016.1168818] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Adriana Samide
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
| | - Bogdan Tutunaru
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
| | - Nicoleta Cioateră
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
| | - Ana-Cristina Vladu
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
- Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania
| | - Cezar Spinu
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
| | - Cristian Tigae
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
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