Green nanocoatings based on the deposition of zirconium oxide: the role of the substrate
| Autor: | Carlos Alemán, Vitor Bonamigo Moreira, Anna Puiggalí-Jou, Elaine Armelin, Emilio Jiménez-Piqué, Alvaro Meneguzzi |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Doctorat en Polímers i Biopolímers, Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Universitat Politècnica de Catalunya. IMEM-BRT- Innovation in Materials and Molecular Engineering - Biomaterials for Regenerative Therapies, Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials, Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Fiabilitat i Micromecànica dels Materials |
| Rok vydání: | 2021 |
| Předmět: |
Revestimentos protetores
Intermetallic Metal-oxide interface metal-oxide interface 02 engineering and technology Electrochemistry lcsh:Technology chemistry.chemical_compound conversion coating 0202 electrical engineering electronic engineering information engineering General Materials Science Zirconium oxide Revestiments lcsh:QC120-168.85 Aqueous solution Zinc phosphate Substratos 021001 nanoscience & nanotechnology Electro-assisted deposition Conversion coating Óxido de zircônio 0210 nano-technology lcsh:TK1-9971 Materials science 020209 energy Oxide Alumini -- Aliatges Article Enginyeria química [Àrees temàtiques de la UPC] zirconium oxide Coatings Monolayer Zirconi -- Aliatges lcsh:Microscopy nanocoating electro-assisted deposition Zirconium alloys aluminum alloys lcsh:QH201-278.5 lcsh:T Nanocoating Substrate (chemistry) Aluminum alloys chemistry Chemical engineering lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Materials Volume 14 Issue 4 Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS Materials, Vol 14, Iss 1043, p 1043 (2021) |
| Popis: | Herein, the influence of the substrate in the formation of zirconium oxide monolayer, from an aqueous hexafluorozirconic acid solution, by chemical conversion and by electro-assisted deposition, has been approached. The nanoscale dimensions of the ZrO2 film is affected by the substrate nature and roughness. This study evidenced that the mechanism of Zr-EAD is dependent on the potential applied and on the substrate composition, whereas conversion coating is uniquely dependent on the adsorption reaction time. The zirconium oxide based nanofilms were more homogenous in AA2024 substrates if compared to pure Al grade (AA1100). It was justified by the high content of Cu alloying element present in the grain boundaries of the latter. Such intermetallic active sites favor the obtaining of ZrO2 films, as demonstrated by XPS and AFM results. From a mechanistic point of view, the electrochemical reactions take place simultaneously with the conventional chemical conversion process driven by ions diffusion. Such findings will bring new perspectives for the generation of controlled oxide coatings in modified electrodes used, as for example, in the construction of battery cells in automotive and in aerospace industries, to replace micrometric layers of zinc phosphate by light-weight zirconium oxide nanometric ones. This study is particularly addressed for the reduction of industrial waste by applying green bath solutions without the need of auxiliary compounds and using lightweight ceramic materials. |
| Databáze: | OpenAIRE |
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