Alternative to Nitric Acid Passivation of 15-5 and 17-4PH Stainless Steel Using Electrochemical Techniques
Increasingly stringent environmental regulations in different sectors of industry, especially the aeronautical sector, suggest the need for more investigations regarding the effect of environmentally friendly corrosion protective processes. Passivation is a finishing process that makes stainless ste...
| Autores principales: | , , , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | inglés |
| Publicado: |
Molecular Diversity Preservation International
2020
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| Materias: | |
| Acceso en línea: | http://eprints.uanl.mx/25196/2/25196.pdf |
| _version_ | 1836640490956521472 |
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| author | Lara Banda, María del Refugio Gaona Tiburcio, Citlalli Zambrano Robledo, Patricia del Carmen Delgado E., Marisol Cabral Miramontes, José Ángel Nieves Mendoza, Demetrio Maldonado Bandala, Erick Estupiñan López, Francisco Humberto Chacón Nava, José G. Almeraya Calderón, Facundo |
| author_facet | Lara Banda, María del Refugio Gaona Tiburcio, Citlalli Zambrano Robledo, Patricia del Carmen Delgado E., Marisol Cabral Miramontes, José Ángel Nieves Mendoza, Demetrio Maldonado Bandala, Erick Estupiñan López, Francisco Humberto Chacón Nava, José G. Almeraya Calderón, Facundo |
| author_sort | Lara Banda, María del Refugio |
| collection | Repositorio Institucional |
| description | Increasingly stringent environmental regulations in different sectors of industry, especially the aeronautical sector, suggest the need for more investigations regarding the effect of environmentally friendly corrosion protective processes. Passivation is a finishing process that makes stainless steels more rust resistant, removing free iron from the steel surface resulting from machining operations. This results in the formation of a protective oxide layer that is less likely to react with the environment and cause corrosion. The most commonly used passivating agent is nitric acid. However, it is know that high levels of toxicity can be generated by using this agent. In this work, a study has been carried out into the electrochemical behavior of 15-5PH (precipitation hardening) and 17-4PH stainless steels passivated with (a) citric and (b) nitric acid solutions for 60 and 90 min at 49 °C, and subsequently exposed to an environment with chlorides. Two electrochemical techniques were used: electrochemical noise (EN) and potentiodynamic polarization curves (PPC) according to ASTM G199-09 and ASTM G5-13, respectively. The results obtained indicated that, for both types of steel, the passive layer formed in citric acid as passivating solution had very similar characteristics to that formed with nitric acid. Furthermore, after exposure to the chloride-containing solution and according with the localization index (LI) values obtained, the stainless steels passivated in citric acid showed a mixed type of corrosion, whereas the steels passivated in nitric acid showed localized corrosion. Overall, the results of the Rn
values derived show very low and similar corrosion rates for the stainless steels passivated with both citric and nitric acid solutions. |
| format | Article |
| id | eprints-25196 |
| institution | UANL |
| language | English |
| publishDate | 2020 |
| publisher | Molecular Diversity Preservation International |
| record_format | eprints |
| spelling | eprints-251962025-07-03T14:24:50Z http://eprints.uanl.mx/25196/ Alternative to Nitric Acid Passivation of 15-5 and 17-4PH Stainless Steel Using Electrochemical Techniques Lara Banda, María del Refugio Gaona Tiburcio, Citlalli Zambrano Robledo, Patricia del Carmen Delgado E., Marisol Cabral Miramontes, José Ángel Nieves Mendoza, Demetrio Maldonado Bandala, Erick Estupiñan López, Francisco Humberto Chacón Nava, José G. Almeraya Calderón, Facundo Ingeniería y Tecnología TA Ingeniería General y Civil Increasingly stringent environmental regulations in different sectors of industry, especially the aeronautical sector, suggest the need for more investigations regarding the effect of environmentally friendly corrosion protective processes. Passivation is a finishing process that makes stainless steels more rust resistant, removing free iron from the steel surface resulting from machining operations. This results in the formation of a protective oxide layer that is less likely to react with the environment and cause corrosion. The most commonly used passivating agent is nitric acid. However, it is know that high levels of toxicity can be generated by using this agent. In this work, a study has been carried out into the electrochemical behavior of 15-5PH (precipitation hardening) and 17-4PH stainless steels passivated with (a) citric and (b) nitric acid solutions for 60 and 90 min at 49 °C, and subsequently exposed to an environment with chlorides. Two electrochemical techniques were used: electrochemical noise (EN) and potentiodynamic polarization curves (PPC) according to ASTM G199-09 and ASTM G5-13, respectively. The results obtained indicated that, for both types of steel, the passive layer formed in citric acid as passivating solution had very similar characteristics to that formed with nitric acid. Furthermore, after exposure to the chloride-containing solution and according with the localization index (LI) values obtained, the stainless steels passivated in citric acid showed a mixed type of corrosion, whereas the steels passivated in nitric acid showed localized corrosion. Overall, the results of the Rn values derived show very low and similar corrosion rates for the stainless steels passivated with both citric and nitric acid solutions. Molecular Diversity Preservation International 2020-06-24 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/25196/2/25196.pdf http://eprints.uanl.mx/25196/2.haspreviewThumbnailVersion/25196.pdf Lara Banda, María del Refugio y Gaona Tiburcio, Citlalli y Zambrano Robledo, Patricia del Carmen y Delgado E., Marisol y Cabral Miramontes, José Ángel y Nieves Mendoza, Demetrio y Maldonado Bandala, Erick y Estupiñan López, Francisco Humberto y Chacón Nava, José G. y Almeraya Calderón, Facundo (2020) Alternative to Nitric Acid Passivation of 15-5 and 17-4PH Stainless Steel Using Electrochemical Techniques. Materials, 13 (12). pp. 1-14. ISSN 1996-1944 https://doi.org/10.3390/ma13122836 https://doi.org/10.3390/ma13122836 |
| spellingShingle | Ingeniería y Tecnología TA Ingeniería General y Civil Lara Banda, María del Refugio Gaona Tiburcio, Citlalli Zambrano Robledo, Patricia del Carmen Delgado E., Marisol Cabral Miramontes, José Ángel Nieves Mendoza, Demetrio Maldonado Bandala, Erick Estupiñan López, Francisco Humberto Chacón Nava, José G. Almeraya Calderón, Facundo Alternative to Nitric Acid Passivation of 15-5 and 17-4PH Stainless Steel Using Electrochemical Techniques |
| thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
| title | Alternative to Nitric Acid Passivation of 15-5 and 17-4PH Stainless Steel Using Electrochemical Techniques |
| title_full | Alternative to Nitric Acid Passivation of 15-5 and 17-4PH Stainless Steel Using Electrochemical Techniques |
| title_fullStr | Alternative to Nitric Acid Passivation of 15-5 and 17-4PH Stainless Steel Using Electrochemical Techniques |
| title_full_unstemmed | Alternative to Nitric Acid Passivation of 15-5 and 17-4PH Stainless Steel Using Electrochemical Techniques |
| title_short | Alternative to Nitric Acid Passivation of 15-5 and 17-4PH Stainless Steel Using Electrochemical Techniques |
| title_sort | alternative to nitric acid passivation of 15 5 and 17 4ph stainless steel using electrochemical techniques |
| topic | Ingeniería y Tecnología TA Ingeniería General y Civil |
| url | http://eprints.uanl.mx/25196/2/25196.pdf |
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