[article]
| Titre : |
Influence of nano-silica doping on the growth behavior and corrosion resistance of γ-APS silane films fabricated by electrochemical-assisted deposition |
| Type de document : |
texte imprimé |
| Auteurs : |
Lixia Yang, Auteur ; Yuanqiang Xiao, Auteur ; Sen Chen, Auteur ; Xiaochun Xie, Auteur ; Junfeng Zhang, Auteur ; Penghua Zheng, Auteur ; Jun-e Qu, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 333-346 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Acier au carbone
Anticorrosifs
Anticorrosion
Electrochimie
Essais de brouillard salin
Métaux -- Revêtements protecteurs
Morphologie (matériaux)
Mouillage (chimie des surfaces)
Nanoparticules
Silanes
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Structure chimique
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The influence of nano-silica doping on the growth behavior and corrosion resistance of γ-APS silane films fabricated by electrochemical-assisted deposition was systematically investigated by reflection absorption infrared spectroscopy, electrochemical impedance spectroscopy, atomic force microscopy, scanning electron microscopy, energy-dispersive X-ray spectrometry, contact angle test and neutral salt spray test. Density functional theory calculation was also applied to elaborate the adsorption behavior of γ-APS on low carbon steel surfaces. And meanwhile, the changes of surface coverage and dissolved oxygen reduction in the cathode surface over time were intensively analyzed according to the I–t curve during electrodeposition process. The experimental results revealed that the impedance values of the composite films firstly increased and then decreased with increasing nano-silica concentration, and there was a critical doping concentration about 0.4 g·L−1, under which the obtained γ-APS silane composite films presented high compactness and protective properties. Other results were highly consistent with the electrochemical results. Moreover, the hydroxyl-rich nano-silica was also involved in the chemical reactions that occurred on the metal surfaces, and the influence mechanism was proposed. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Preparation of silane composite films - Chemical structure analysis - Electrochemical evaluation - Surface morphology analysis - Water wetting performance evaluation - Corrosion resistance analysis - Calculation details and models
- RESULTS AND DISCUSSION : Chemical structure analysis - Electrochemical evaluation - Surface morphology analysis - Water wetting property - Salt spray resistance - Doping models
- Table 1 : Electrochemical parameters extracted from modeling the Nyquist and Bode diagrams
- Table 2 : Calculated adsorption energies of series reaction |
| DOI : |
https://doi.org/10.1007/s11998-022-674-2 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-022-00674-2.pdf?pdf=button% [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38846 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 1 (01/2023) . - p. 333-346
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Influence of nano-silica doping on the growth behavior and corrosion resistance of γ-APS silane films fabricated by electrochemical-assisted deposition in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
