Curable hybrid materials for corrosion protection of steel : development and application of UV-cured 3-methacryloxypropyltrimethoxysilane-derived coatings / Kevin M. Scotland in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 4 (07/2020) . - p. 977-989 Titre : Curable hybrid materials for corrosion protection of steel : development and application of UV-cured 3-methacryloxypropyltrimethoxysilane-derived coatings Type de document : texte imprimé Auteurs : Kevin M. Scotland, Auteur ; Shegufa Shetranjiwalla, Auteur ; Andrew J. Vreugdenhil, Auteur Année de publication : 2020 Article en page(s) : p. 977-989 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone Anticorrosifs Anticorrosion Caractérisation Condensation Dip-coating Essais (technologie) Formulation (Génie chimique) Hydrolyse Métaux -- Revêtements protecteurs Méthacryloxypropyltriméthoxysilane Revêtements -- Séchage sous rayonnement ultraviolet Revêtements organiques Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : A UV-crosslinkable two-component organically modified silicate (ORMOSIL) sol–gel coating was made using 3-methacryloxypropyltrimethoxysilane (MaPTMS) and tetraethoxysilane (TEOS) in two stages. In the first stage, key synthetic parameters, such as use of co-solvents, reaction temperature, reaction time, and catalyst, were optimized for the rapid hydrolysis and condensation of the ORMOSIL. The ORMOSIL material was made using isopropanol as the solvent and HNO3 as the acid catalyst. This resulted in a sol–gel that underwent rapid hydrolysis in 35 s. The ORMOSIL demonstrated extensive condensation after 10 min of stirring at room temperature followed by 10 min of heating at 60°C as monitored by 29Si-NMR. In the second stage, the ORMOSIL was successfully crosslinked with up to 70% consumption of the acryl functionality within 5 min under UV light exposure in the presence of photoinitiator. The UV-crosslinked coating exhibited high adhesion to low-carbon steel and impeded substrate corrosion from 17 to 25 h under an accelerated corrosive environment. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of sol-gel formulation MaT - Variation of solvent and acid catalysts - Dip coating and crosslinking - Characterization - Corrosion performance testing - RESULTS AND DISCUSSION : Sol-gel formulation - Hydrolysis and condensation - UV crosslinking - Corrosion inhibition results DOI : https://doi.org/10.1007/s11998-019-00317-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00317-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34385 [article]

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