Data: Hybrid PEO/sol-gel coatings loaded with Ce for corrosion protection of AA2024-T3
Plasma electrolytic oxidation (PEO) has been targeted as an eco-friendly alternative technology to conventional chromic acid anodizing (CAA) for corrosion protection of aluminium alloys in the aircraft industry. However, conventional PEO technology implies high energy consumption. Flash-PEO coatings...
| Autores: | , , , , , , |
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| Tipo de recurso: | conjunto de datos |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/118658 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/118658 |
| Access Level: | acceso abierto |
| Palabra clave: | 620 PEO coating Hybrid sol-gel coating Green corrosion inhibitor Active corrosion protection Cerium Materiales 3312 Tecnología de Materiales |
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oai:docta.ucm.es:20.500.14352/118658 |
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Data: Hybrid PEO/sol-gel coatings loaded with Ce for corrosion protection of AA2024-T3 Del Olmo Martínez, Rubén López Martínez, Esther Matykina, Endzhe Tiringer, Ursa Mol, J.M.C. Mohedano Sánchez, Marta Arrabal Durán, Raúl 620 PEO coating Hybrid sol-gel coating Green corrosion inhibitor Active corrosion protection Cerium Materiales 3312 Tecnología de Materiales Plasma electrolytic oxidation (PEO) has been targeted as an eco-friendly alternative technology to conventional chromic acid anodizing (CAA) for corrosion protection of aluminium alloys in the aircraft industry. However, conventional PEO technology implies high energy consumption. Flash-PEO coatings (≤10 μm) produced in short treatment times (≤ 5 min) constitute a feasible way to overcome this limitation. Nevertheless, the long-term corrosion resistance is compromised, thus requiring novel sealing post-treatments. The present work studies the effect of stand-alone hybrid sol-gel (HSG) and Ce-doped hybrid sol-gel (HSG-Ce) coatings as a sealing post-treatment to evaluate the long-term corrosion resistance of Flash-PEO coatings on aluminium alloy (AA) 2024-T3. The characterization of the PEO, HSG, and HSG-Ce coatings was performed by scanning electron microscopy, X-ray diffraction, water contact angle, dry adhesion tests (ISO 2409), optical profilometry and Fourier transform infrared spectroscopy. The corrosion behaviour was assessed by electrochemical impedance spectroscopy up to 21 days (3.5 wt% NaCl). Active corrosion protection was assessed by immersion tests of artificially scratched coatings. Present findings reveal that low-energy-cost Flash-PEO coatings were successfully formed on AA2024-T3 alloy. Both HSG and HSG-Ce coatings were homogeneously formed on Flash PEO coating. Regarding the corrosion resistance, HSG-Ce showed significant scratch protection during 21 days of immersion in 3.5 wt% NaCl. The results suggest that, while the release of Si and Ce from the coating provided corrosion protection, nitrate release promoted localized corrosion phenomena in the scribe. This was associated with the preferential pitting corrosion phenomena at the Cu-rich intermetallic compounds instead of forming a thick and stablenitrate-rich passive layer. Elsevier https://hdl.handle.net/20.500.14352/118658 |
| title |
Data: Hybrid PEO/sol-gel coatings loaded with Ce for corrosion protection of AA2024-T3 |
| spellingShingle |
Data: Hybrid PEO/sol-gel coatings loaded with Ce for corrosion protection of AA2024-T3 Del Olmo Martínez, Rubén 620 PEO coating Hybrid sol-gel coating Green corrosion inhibitor Active corrosion protection Cerium Materiales 3312 Tecnología de Materiales |
| title_short |
Data: Hybrid PEO/sol-gel coatings loaded with Ce for corrosion protection of AA2024-T3 |
| title_full |
Data: Hybrid PEO/sol-gel coatings loaded with Ce for corrosion protection of AA2024-T3 |
| title_fullStr |
Data: Hybrid PEO/sol-gel coatings loaded with Ce for corrosion protection of AA2024-T3 |
| title_full_unstemmed |
Data: Hybrid PEO/sol-gel coatings loaded with Ce for corrosion protection of AA2024-T3 |
| title_sort |
Data: Hybrid PEO/sol-gel coatings loaded with Ce for corrosion protection of AA2024-T3 |
| author |
Del Olmo Martínez, Rubén |
| author_facet |
Del Olmo Martínez, Rubén López Martínez, Esther Matykina, Endzhe Tiringer, Ursa Mol, J.M.C. Mohedano Sánchez, Marta Arrabal Durán, Raúl |
| author_role |
author |
| author2 |
López Martínez, Esther Matykina, Endzhe Tiringer, Ursa Mol, J.M.C. Mohedano Sánchez, Marta Arrabal Durán, Raúl |
| author2_role |
author author author author author author |
| topic |
620 PEO coating Hybrid sol-gel coating Green corrosion inhibitor Active corrosion protection Cerium Materiales 3312 Tecnología de Materiales |
| topic_facet |
620 PEO coating Hybrid sol-gel coating Green corrosion inhibitor Active corrosion protection Cerium Materiales 3312 Tecnología de Materiales |
| description |
Plasma electrolytic oxidation (PEO) has been targeted as an eco-friendly alternative technology to conventional chromic acid anodizing (CAA) for corrosion protection of aluminium alloys in the aircraft industry. However, conventional PEO technology implies high energy consumption. Flash-PEO coatings (≤10 μm) produced in short treatment times (≤ 5 min) constitute a feasible way to overcome this limitation. Nevertheless, the long-term corrosion resistance is compromised, thus requiring novel sealing post-treatments. The present work studies the effect of stand-alone hybrid sol-gel (HSG) and Ce-doped hybrid sol-gel (HSG-Ce) coatings as a sealing post-treatment to evaluate the long-term corrosion resistance of Flash-PEO coatings on aluminium alloy (AA) 2024-T3. The characterization of the PEO, HSG, and HSG-Ce coatings was performed by scanning electron microscopy, X-ray diffraction, water contact angle, dry adhesion tests (ISO 2409), optical profilometry and Fourier transform infrared spectroscopy. The corrosion behaviour was assessed by electrochemical impedance spectroscopy up to 21 days (3.5 wt% NaCl). Active corrosion protection was assessed by immersion tests of artificially scratched coatings. Present findings reveal that low-energy-cost Flash-PEO coatings were successfully formed on AA2024-T3 alloy. Both HSG and HSG-Ce coatings were homogeneously formed on Flash PEO coating. Regarding the corrosion resistance, HSG-Ce showed significant scratch protection during 21 days of immersion in 3.5 wt% NaCl. The results suggest that, while the release of Si and Ce from the coating provided corrosion protection, nitrate release promoted localized corrosion phenomena in the scribe. This was associated with the preferential pitting corrosion phenomena at the Cu-rich intermetallic compounds instead of forming a thick and stablenitrate-rich passive layer. |
| publishDate |
2023 |
| format |
dataset |
| url |
https://hdl.handle.net/20.500.14352/118658 |
| language |
eng |
| eu_rights_str_mv |
openAccess |
| publisher |
Elsevier |
| institution |
Universidad Complutense de Madrid (UCM) |
| collection |
Docta Complutense |
| reponame_str |
Docta Complutense |
| instname_str |
Universidad Complutense de Madrid (UCM) |
| _version_ |
1878438981962563584 |
| publishDateSort |
2023 |
| author_browse |
Arrabal Durán, Raúl Del Olmo Martínez, Rubén López Martínez, Esther Matykina, Endzhe Mohedano Sánchez, Marta Mol, J.M.C. Tiringer, Ursa |
| publisherStr |
Elsevier |
| score |
6,9303427 |