Improving the properties of alumina films on carbon steel by optimizing the production of boehmite conversion coatings
In this work, multivariate analysis was applied to evaluate the influence of the deposition time (t), withdraw speed (v), and heating time (HT) used to produce boehmite conversion coatings and to optimize these conditions aiming the improvement of the final alumina-coated system's anti-corrosiv...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424003016 |
| _version_ | 1797247882920722432 |
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| author | Antonio Vitor Castro Braga Dalva Cristina Baptista do Lago Renata Antoun Simão André Rocha Pimenta Lilian Ferreira de Senna |
| author_facet | Antonio Vitor Castro Braga Dalva Cristina Baptista do Lago Renata Antoun Simão André Rocha Pimenta Lilian Ferreira de Senna |
| author_sort | Antonio Vitor Castro Braga |
| collection | DOAJ |
| description | In this work, multivariate analysis was applied to evaluate the influence of the deposition time (t), withdraw speed (v), and heating time (HT) used to produce boehmite conversion coatings and to optimize these conditions aiming the improvement of the final alumina-coated system's anti-corrosive properties. It was verified that v was the most influent factor on the studied variables, showing a positive effect in boehmite conversion coating thickness (BxSthickness) and a negative effect on the global corrosion resistance (Rg) and polarization resistance (Rp) of the whole coating systems. The highest anti-corrosive protection was obtained when conversion coating was produced using t = 284 s; v = 116 mm min−1 and HT = 221 min. The boehmite conversion coating prepared under this condition exhibited a homogeneous morphology, with sharp grains and no defects, high roughness (0.406 μm), and a complex mixture of aluminum and iron oxides in its composition, which may have contributed to the performance observed for the system in the saline medium. This combination also promoted the chemical stability of the whole system in the studied aggressive medium and increased the system's mechanical resistance. |
| first_indexed | 2024-03-08T03:31:26Z |
| format | Article |
| id | doaj.art-8a90a86eee77438cb17f5eda7e79e88b |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:05:46Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-8a90a86eee77438cb17f5eda7e79e88b2024-03-24T06:57:58ZengElsevierJournal of Materials Research and Technology2238-78542024-03-012928432856Improving the properties of alumina films on carbon steel by optimizing the production of boehmite conversion coatingsAntonio Vitor Castro Braga0Dalva Cristina Baptista do Lago1Renata Antoun Simão2André Rocha Pimenta3Lilian Ferreira de Senna4Rio de Janeiro State University, Department of Analytical Chemistry, Laboratory of Electrochemical and Corrosion, Rua São Francisco Xavier, 524, PHLC, Sala 427, Maracanã, ZIP CODE 20559-013 Rio de Janeiro, RJ, BrazilRio de Janeiro State University, Department of Analytical Chemistry, Laboratory of Electrochemical and Corrosion, Rua São Francisco Xavier, 524, PHLC, Sala 427, Maracanã, ZIP CODE 20559-013 Rio de Janeiro, RJ, BrazilFederal University of Rio de Janeiro, Metallurgical and Materials Engineering Program, Av. Athos da Silveira Ramos, 149, CT, Bl. F - 213, Cidade Universitária, Ilha do Fundão, ZIP CODE 21941-909 Rio de Janeiro, RJ, BrazilFederal Institute of Education, Science, and Technology of Rio de Janeiro campus Paracambi, Laboratory of Computer Instrumentation and Simulation, Rua Sebastião de Lacerda, S/N – Fábrica, ZIP CODE 26600-000 Paracambi, RJ, BrazilRio de Janeiro State University, Department of Analytical Chemistry, Laboratory of Electrochemical and Corrosion, Rua São Francisco Xavier, 524, PHLC, Sala 427, Maracanã, ZIP CODE 20559-013 Rio de Janeiro, RJ, Brazil; Corresponding author.In this work, multivariate analysis was applied to evaluate the influence of the deposition time (t), withdraw speed (v), and heating time (HT) used to produce boehmite conversion coatings and to optimize these conditions aiming the improvement of the final alumina-coated system's anti-corrosive properties. It was verified that v was the most influent factor on the studied variables, showing a positive effect in boehmite conversion coating thickness (BxSthickness) and a negative effect on the global corrosion resistance (Rg) and polarization resistance (Rp) of the whole coating systems. The highest anti-corrosive protection was obtained when conversion coating was produced using t = 284 s; v = 116 mm min−1 and HT = 221 min. The boehmite conversion coating prepared under this condition exhibited a homogeneous morphology, with sharp grains and no defects, high roughness (0.406 μm), and a complex mixture of aluminum and iron oxides in its composition, which may have contributed to the performance observed for the system in the saline medium. This combination also promoted the chemical stability of the whole system in the studied aggressive medium and increased the system's mechanical resistance.http://www.sciencedirect.com/science/article/pii/S2238785424003016Experimental designOptimizationCorrosion resistanceRoughnessNanoindentation |
| spellingShingle | Antonio Vitor Castro Braga Dalva Cristina Baptista do Lago Renata Antoun Simão André Rocha Pimenta Lilian Ferreira de Senna Improving the properties of alumina films on carbon steel by optimizing the production of boehmite conversion coatings Journal of Materials Research and Technology Experimental design Optimization Corrosion resistance Roughness Nanoindentation |
| title | Improving the properties of alumina films on carbon steel by optimizing the production of boehmite conversion coatings |
| title_full | Improving the properties of alumina films on carbon steel by optimizing the production of boehmite conversion coatings |
| title_fullStr | Improving the properties of alumina films on carbon steel by optimizing the production of boehmite conversion coatings |
| title_full_unstemmed | Improving the properties of alumina films on carbon steel by optimizing the production of boehmite conversion coatings |
| title_short | Improving the properties of alumina films on carbon steel by optimizing the production of boehmite conversion coatings |
| title_sort | improving the properties of alumina films on carbon steel by optimizing the production of boehmite conversion coatings |
| topic | Experimental design Optimization Corrosion resistance Roughness Nanoindentation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424003016 |
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