Anodizing of AA2024 Aluminum–Copper Alloy in Citric-Sulfuric Acid Solution: Effect of Current Density on Corrosion Resistance
Al–Cu alloys are widely used as a structural material in the manufacture of commercial aircraft due to their high mechanical properties such as hardness, strength, low density, and tolerance to fatigue damage and corrosion. One of the main problems of these Al–Cu alloy systems is their low corrosion...
| Autores principales: | , , , , , , , , , |
|---|---|
| Formato: | Artículo |
| Lenguaje: | inglés |
| Publicado: |
Molecular Diversity Preservation International
2024
|
| Materias: | |
| Acceso en línea: | http://eprints.uanl.mx/27872/1/coatings-14-00816.pdf |
| _version_ | 1824420844346015744 |
|---|---|
| author | Cabral Miramontes, José Ángel Cabral Miramontes, Noe Nieves Mendoza, Demetrio Lara Banda, María del Refugio Maldonado Bandala, Erick Olguín Coca, Javier López León, Luis Daimir Estupiñan López, Francisco H. Almeraya Calderón, Facundo Gaona Tiburcio, Citlalli |
| author_facet | Cabral Miramontes, José Ángel Cabral Miramontes, Noe Nieves Mendoza, Demetrio Lara Banda, María del Refugio Maldonado Bandala, Erick Olguín Coca, Javier López León, Luis Daimir Estupiñan López, Francisco H. Almeraya Calderón, Facundo Gaona Tiburcio, Citlalli |
| author_sort | Cabral Miramontes, José Ángel |
| collection | Repositorio Institucional |
| description | Al–Cu alloys are widely used as a structural material in the manufacture of commercial aircraft due to their high mechanical properties such as hardness, strength, low density, and tolerance to fatigue damage and corrosion. One of the main problems of these Al–Cu alloy systems is their low corrosion resistance. The purpose of this study is to analyze the influence of anodizing parameters on aluminum–copper alloy (AA 2024) using a bath of citric-sulfuric acid with different anodizing current densities on the thickness, microhardness, and corrosion resistance of the anodized layer. Hard anodizing is performed on AA 2024 Al–Cu alloy in mixtures of solutions composed of citric and sulfuric acid at different concentrations for 60 min and using current densities (i) of 0.03, 0.045, and 0.06 A/cm2. Scanning electron microscopy (SEM) was used to analyze the surface morphology and thickness of the anodized layer. The mechanical properties of the hard anodized material are evaluated using the Vickers hardness test. The electrochemical techniques use cyclic potentiodynamic polarization curves (CPPC) according to ASTM-G6 and electrochemical impedance spectroscopy (EIS) according to ASTM-G61 and ASTM-G106, respectively, in the electrolyte of NaCl at 3.5 wt. % as a simulation of the marine atmosphere. The results indicate that corrosion resistance anodizing in citric-sulfuric acid solutions with a current density of 0.06 A/cm2 is the best with a corrosion current density (jcorr) of 1.29 × 10−8 A/cm2. It is possible to produce hard anodizing with citric and sulfuric acid solutions that exhibit mechanical properties and corrosion resistance similar or superior to conventional sulfuric acid anodizing.
Keywords: aerospace alloy; corrosion; anodizing; electrochemistry |
| format | Article |
| id | eprints-27872 |
| institution | UANL |
| language | English |
| publishDate | 2024 |
| publisher | Molecular Diversity Preservation International |
| record_format | eprints |
| spelling | eprints-278722024-08-06T18:11:01Z http://eprints.uanl.mx/27872/ Anodizing of AA2024 Aluminum–Copper Alloy in Citric-Sulfuric Acid Solution: Effect of Current Density on Corrosion Resistance Cabral Miramontes, José Ángel Cabral Miramontes, Noe Nieves Mendoza, Demetrio Lara Banda, María del Refugio Maldonado Bandala, Erick Olguín Coca, Javier López León, Luis Daimir Estupiñan López, Francisco H. Almeraya Calderón, Facundo Gaona Tiburcio, Citlalli TA Ingeniería General y Civil Al–Cu alloys are widely used as a structural material in the manufacture of commercial aircraft due to their high mechanical properties such as hardness, strength, low density, and tolerance to fatigue damage and corrosion. One of the main problems of these Al–Cu alloy systems is their low corrosion resistance. The purpose of this study is to analyze the influence of anodizing parameters on aluminum–copper alloy (AA 2024) using a bath of citric-sulfuric acid with different anodizing current densities on the thickness, microhardness, and corrosion resistance of the anodized layer. Hard anodizing is performed on AA 2024 Al–Cu alloy in mixtures of solutions composed of citric and sulfuric acid at different concentrations for 60 min and using current densities (i) of 0.03, 0.045, and 0.06 A/cm2. Scanning electron microscopy (SEM) was used to analyze the surface morphology and thickness of the anodized layer. The mechanical properties of the hard anodized material are evaluated using the Vickers hardness test. The electrochemical techniques use cyclic potentiodynamic polarization curves (CPPC) according to ASTM-G6 and electrochemical impedance spectroscopy (EIS) according to ASTM-G61 and ASTM-G106, respectively, in the electrolyte of NaCl at 3.5 wt. % as a simulation of the marine atmosphere. The results indicate that corrosion resistance anodizing in citric-sulfuric acid solutions with a current density of 0.06 A/cm2 is the best with a corrosion current density (jcorr) of 1.29 × 10−8 A/cm2. It is possible to produce hard anodizing with citric and sulfuric acid solutions that exhibit mechanical properties and corrosion resistance similar or superior to conventional sulfuric acid anodizing. Keywords: aerospace alloy; corrosion; anodizing; electrochemistry Molecular Diversity Preservation International 2024-06-30 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/27872/1/coatings-14-00816.pdf http://eprints.uanl.mx/27872/1.haspreviewThumbnailVersion/coatings-14-00816.pdf Cabral Miramontes, José Ángel y Cabral Miramontes, Noe y Nieves Mendoza, Demetrio y Lara Banda, María del Refugio y Maldonado Bandala, Erick y Olguín Coca, Javier y López León, Luis Daimir y Estupiñan López, Francisco H. y Almeraya Calderón, Facundo y Gaona Tiburcio, Citlalli (2024) Anodizing of AA2024 Aluminum–Copper Alloy in Citric-Sulfuric Acid Solution: Effect of Current Density on Corrosion Resistance. Coatings, 14 (7). pp. 1-23. ISSN 2079-6412 https://doi.org/10.3390/coatings14070816 816 |
| spellingShingle | TA Ingeniería General y Civil Cabral Miramontes, José Ángel Cabral Miramontes, Noe Nieves Mendoza, Demetrio Lara Banda, María del Refugio Maldonado Bandala, Erick Olguín Coca, Javier López León, Luis Daimir Estupiñan López, Francisco H. Almeraya Calderón, Facundo Gaona Tiburcio, Citlalli Anodizing of AA2024 Aluminum–Copper Alloy in Citric-Sulfuric Acid Solution: Effect of Current Density on Corrosion Resistance |
| thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
| title | Anodizing of AA2024 Aluminum–Copper Alloy in Citric-Sulfuric Acid Solution: Effect of Current Density on Corrosion Resistance |
| title_full | Anodizing of AA2024 Aluminum–Copper Alloy in Citric-Sulfuric Acid Solution: Effect of Current Density on Corrosion Resistance |
| title_fullStr | Anodizing of AA2024 Aluminum–Copper Alloy in Citric-Sulfuric Acid Solution: Effect of Current Density on Corrosion Resistance |
| title_full_unstemmed | Anodizing of AA2024 Aluminum–Copper Alloy in Citric-Sulfuric Acid Solution: Effect of Current Density on Corrosion Resistance |
| title_short | Anodizing of AA2024 Aluminum–Copper Alloy in Citric-Sulfuric Acid Solution: Effect of Current Density on Corrosion Resistance |
| title_sort | anodizing of aa2024 aluminum copper alloy in citric sulfuric acid solution effect of current density on corrosion resistance |
| topic | TA Ingeniería General y Civil |
| url | http://eprints.uanl.mx/27872/1/coatings-14-00816.pdf |
| work_keys_str_mv | AT cabralmiramontesjoseangel anodizingofaa2024aluminumcopperalloyincitricsulfuricacidsolutioneffectofcurrentdensityoncorrosionresistance AT cabralmiramontesnoe anodizingofaa2024aluminumcopperalloyincitricsulfuricacidsolutioneffectofcurrentdensityoncorrosionresistance AT nievesmendozademetrio anodizingofaa2024aluminumcopperalloyincitricsulfuricacidsolutioneffectofcurrentdensityoncorrosionresistance AT larabandamariadelrefugio anodizingofaa2024aluminumcopperalloyincitricsulfuricacidsolutioneffectofcurrentdensityoncorrosionresistance AT maldonadobandalaerick anodizingofaa2024aluminumcopperalloyincitricsulfuricacidsolutioneffectofcurrentdensityoncorrosionresistance AT olguincocajavier anodizingofaa2024aluminumcopperalloyincitricsulfuricacidsolutioneffectofcurrentdensityoncorrosionresistance AT lopezleonluisdaimir anodizingofaa2024aluminumcopperalloyincitricsulfuricacidsolutioneffectofcurrentdensityoncorrosionresistance AT estupinanlopezfranciscoh anodizingofaa2024aluminumcopperalloyincitricsulfuricacidsolutioneffectofcurrentdensityoncorrosionresistance AT almerayacalderonfacundo anodizingofaa2024aluminumcopperalloyincitricsulfuricacidsolutioneffectofcurrentdensityoncorrosionresistance AT gaonatiburciocitlalli anodizingofaa2024aluminumcopperalloyincitricsulfuricacidsolutioneffectofcurrentdensityoncorrosionresistance |