Nitrate Ions’ Influence on the Alloy 22 Corrosion Behavior
Alloy 22 (N06022), is a nickel based alloy, with a high content of chromium (∼22%) and molybdenum (∼13%) that belongs to the Ni-Cr-Mo alloys family. Different studies show that the alloy 22 is resistant to generalized and localized (in crevices) corrosion in aqueous solution, with high chloride conc...
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| Format: | Online |
| Language: | spa |
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Universidad Pedagógica y Tecnológica de Colombia
2015
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| Online Access: | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/4843 |
| _version_ | 1801706074482409472 |
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| author | Rincón-Ortiz, Mauricio Rodríguez, Martín Alejandro Carranza, Ricardo Mario |
| author_facet | Rincón-Ortiz, Mauricio Rodríguez, Martín Alejandro Carranza, Ricardo Mario |
| author_sort | Rincón-Ortiz, Mauricio |
| collection | OJS |
| description | Alloy 22 (N06022), is a nickel based alloy, with a high content of chromium (∼22%) and molybdenum (∼13%) that belongs to the Ni-Cr-Mo alloys family. Different studies show that the alloy 22 is resistant to generalized and localized (in crevices) corrosion in aqueous solution, with high chloride concentration, and in a wide range of temperatures.Electrochemical techniques such as Electrochemical Impedance Spectroscopy (EIS) and PotentiodynamicGalvanostatic-Potentiodynamic (PD-GS-PD) and non-electrochemical techniques such as the Scanning Electron Microscopy (SEM), were applied to determine the effect of the ionic nitrates and chlorides upon the alloy 22 at 90 oC generalized and localized corrosion.The results show that for a critical molar concentration ratio R= [NO3 -]/ [Cl-] ≥0.2 it is completely eliminated the alloy 22 susceptibility to the crevice corrosion. The corrosion speed rates obtained were about 0.1μm/year at 24 hours of immersion. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-4843 |
| institution | Revista Facultad de Ingeniería |
| language | spa |
| publishDate | 2015 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-48432021-08-03T14:53:37Z Nitrate Ions’ Influence on the Alloy 22 Corrosion Behavior Influencia de los iones nitrato en la corrosión de la Aleación 22 Rincón-Ortiz, Mauricio Rodríguez, Martín Alejandro Carranza, Ricardo Mario alloy 22 crevice corrosion nitrates repassivation potential PD-GS-PD aleación 22 Corrosión en rendijas Nitratos Potencial de repasivación PD-GS-PD Alloy 22 (N06022), is a nickel based alloy, with a high content of chromium (∼22%) and molybdenum (∼13%) that belongs to the Ni-Cr-Mo alloys family. Different studies show that the alloy 22 is resistant to generalized and localized (in crevices) corrosion in aqueous solution, with high chloride concentration, and in a wide range of temperatures.Electrochemical techniques such as Electrochemical Impedance Spectroscopy (EIS) and PotentiodynamicGalvanostatic-Potentiodynamic (PD-GS-PD) and non-electrochemical techniques such as the Scanning Electron Microscopy (SEM), were applied to determine the effect of the ionic nitrates and chlorides upon the alloy 22 at 90 oC generalized and localized corrosion.The results show that for a critical molar concentration ratio R= [NO3 -]/ [Cl-] ≥0.2 it is completely eliminated the alloy 22 susceptibility to the crevice corrosion. The corrosion speed rates obtained were about 0.1μm/year at 24 hours of immersion. La aleación 22 (N06022) pertenece a la familia de aleaciones Ni-Cr-Mo, su base es el níquel y tiene un alto contenido de cromo (~22%) y molibdeno (~13%). Diversos estudios muestran que la aleación 22 es resistente a la corrosión generalizada y localizada (en rendijas) en soluciones acuosas, con altas concentraciones de cloruro y un amplio rango de temperaturas.Para este trabajo se aplicaron técnicas electroquímicas, tales como Espectroscopia de Impedancia Electroquímica (EIS) y ensayos Potenciodinámicos-Galvanostáticos-Potenciodinámicos (PD‑GS‑PD), además de técnicas complementarias no electroquímicas, como Microscopia Electrónica de Barrido, para determinar el efecto de los iones nitrato y cloruro sobre la corrosión generalizada y localizada de la aleación 22 a 90 oC.Los resultados muestran que para la relación molar crítica R= [NO3 -]/ [Cl-] ≥0.2 se elimina completamente la susceptibilidad de la aleación 22 a la corrosión en rendijas. Las velocidades de corrosión obtenidas fueron del orden de 0.1 μm/año a 24 horas de inmersión. Universidad Pedagógica y Tecnológica de Colombia 2015-09-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion investigation investigación application/pdf text/html https://revistas.uptc.edu.co/index.php/ingenieria/article/view/4843 10.19053/01211129.4843 Revista Facultad de Ingeniería; Vol. 24 No. 40 (2015); 107-116 Revista Facultad de Ingeniería; Vol. 24 Núm. 40 (2015); 107-116 2357-5328 0121-1129 spa https://revistas.uptc.edu.co/index.php/ingenieria/article/view/4843/3884 https://revistas.uptc.edu.co/index.php/ingenieria/article/view/4843/4340 Copyright (c) 2015 Mauricio Rincón-Ortiz, Martín Alejandro Rodríguez, Ricardo Mario Carranza http://creativecommons.org/licenses/by/4.0 |
| spellingShingle | alloy 22 crevice corrosion nitrates repassivation potential PD-GS-PD aleación 22 Corrosión en rendijas Nitratos Potencial de repasivación PD-GS-PD Rincón-Ortiz, Mauricio Rodríguez, Martín Alejandro Carranza, Ricardo Mario Nitrate Ions’ Influence on the Alloy 22 Corrosion Behavior |
| title | Nitrate Ions’ Influence on the Alloy 22 Corrosion Behavior |
| title_alt | Influencia de los iones nitrato en la corrosión de la Aleación 22 |
| title_full | Nitrate Ions’ Influence on the Alloy 22 Corrosion Behavior |
| title_fullStr | Nitrate Ions’ Influence on the Alloy 22 Corrosion Behavior |
| title_full_unstemmed | Nitrate Ions’ Influence on the Alloy 22 Corrosion Behavior |
| title_short | Nitrate Ions’ Influence on the Alloy 22 Corrosion Behavior |
| title_sort | nitrate ions influence on the alloy 22 corrosion behavior |
| topic | alloy 22 crevice corrosion nitrates repassivation potential PD-GS-PD aleación 22 Corrosión en rendijas Nitratos Potencial de repasivación PD-GS-PD |
| topic_facet | alloy 22 crevice corrosion nitrates repassivation potential PD-GS-PD aleación 22 Corrosión en rendijas Nitratos Potencial de repasivación PD-GS-PD |
| url | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/4843 |
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