Enhancement of corrosion protection of 3-glycidoxypropyltrimethoxysilane-based sol–gel coating through methylthiourea doping / Rajendran Babhu Vignesh in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 4 (07/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 4 (07/2014) . - p. 545-554 Titre : Enhancement of corrosion protection of 3-glycidoxypropyltrimethoxysilane-based sol–gel coating through methylthiourea doping Type de document : texte imprimé Auteurs : Rajendran Babhu Vignesh, Auteur ; Mathur Gopalakrishnan Stehuraman, Auteur Année de publication : 2014 Article en page(s) : p. 545-554 Note générale : Bibliogr. Langues : Américain (ame) Catégories : 3-Glycidoxypropyltrimethoxysilane Anticorrosion Electrochimie Métaux -- Revêtements protecteurs Méthylthiourée Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : Protection of aluminum metal and its alloys from corrosion is a key requirement for many engineering applications. Nowadays, sol–gel coating technology is recognized as the ideal replacement for chromate conversion coatings. The present work makes use of 3-glycidoxypropyltrimethoxysilane (GPTMS) as a precursor for sol–gel coating. GPTMS was subjected to hydrolysis and subsequent condensation reaction to get a three-dimensional network and methylthiourea (MTU) was incorporated into the sol–gel matrix. MTU-doped GPTMS-based sol–gel coatings were applied over aluminum metal by dip coating method. The resultant coating was studied by FTIR, XRD and SEM. MTU-doped GPTMS-based sol–gel coatings increased the hydrophobic nature of the coating and were stable up to a temperature of 450°C. The protective nature of the coatings was evaluated in a 1% NaCl environment using electrochemical impedance and polarization studies. The study has revealed that doping of MTU enhanced the protection ability of doped GPTMS-based sol–gel coating to a significant extent. Note de contenu : - EXPERIMENTAL : Materials - Preparation of coating - Characterization of sol-gel coating - Corrosion-resistance behavior of coating - RESULTS AND DISCUSSION : Fourier transform infrared analysis (FTIR) - X-ray diffraction analysis (XRD) - Thickness measurement by stylus profiler - Thermal stability of coating - Electrochemical behavior of sol-gel coating - Electrochemical impedance spectroscopy (EIS) - Potentiodynamic polarization study (PDS) - Scanning electron microscope with EDX analysis DOI : 10.1007/s11998-013-9557-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9557-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21715 [article]

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