Corrosion Behaviour of 304 Austenitic, 15-5PH and 17-4PH Passive Stainless Steels in acid solutions
Lara Banda, María del Refugio y Gaona Tiburcio, Citlalli y Zambrano Robledo, Patricia del Carmen y Cabral Miramontes, José Ángel y Estupiñan López, Francisco H. y Baltazar Zamora, Miguel Ángel y Croche B., R. y Vera V., E. y Almeraya Calderón, Facundo (2018) Corrosion Behaviour of 304 Austenitic, 15-5PH and 17-4PH Passive Stainless Steels in acid solutions. International Journal of Electrochemical Science, 13. pp. 10314-10324. ISSN 14523981
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Resumen
The objective of this work was to study is use electrochemical techniques to determinate the growth conditions, characteristics and resistance of passive layers of stainless steel (SS): 304 austenitic, 17-4PH (precipitation hardening) and 15-5PH. Passivation of the SS was performed in 15% citric acid at temperatures of 25 and 49 °C. The corrosion kinetics was obtained using the electrochemical technique as potentiodynamic polarization (PP), in a three-electrode system. The electrolytes used were sodium chloride (5 wt. % NaCl) and sulfuric acid (1 wt. % H2SO4). Passivation in citric acid allows obtain passive layers at temperatures of 49°C with immersion times of 30 minutes. In precipitation hardening steels, passive layers up to 360 mV in sodium chloride. Can be obtained. In sulfuric acid, there is a mechanism of passivation – transpassivation - secondary passivation, this due to the high electropositive values of potential.
Tipo de elemento: | Article | ||||||||||||||||||||||||||||||
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Palabras claves no controlados: | Stainless Steels ; Precipitation Hardening ; Corrosion ; Passivation. | ||||||||||||||||||||||||||||||
Materias: | T Tecnología > TA Ingeniería General y Civil | ||||||||||||||||||||||||||||||
Divisiones: | Ingeniería Mecánica y Eléctrica | ||||||||||||||||||||||||||||||
Usuario depositante: | Editor Repositorio | ||||||||||||||||||||||||||||||
Creadores: |
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Fecha del depósito: | 02 Mayo 2023 14:24 | ||||||||||||||||||||||||||||||
Última modificación: | 05 Mar 2024 15:25 | ||||||||||||||||||||||||||||||
URI: | http://eprints.uanl.mx/id/eprint/25150 |
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