Corrosion protection performance of nanocomposite coatings under static, UV, and dynamic conditions / Y. A. Basiru in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 5 (09/2018) . - p. 1035-1047 Titre : Corrosion protection performance of nanocomposite coatings under static, UV, and dynamic conditions Type de document : texte imprimé Auteurs : Y. A. Basiru, Auteur ; Sh. Ammar, Auteur ; K. Ramesh ; B. Vengadaesvaran ; S. Ramesh ; A. K. Arof Année de publication : 2018 Article en page(s) : p. 1035-1047 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corrosion Matériaux hybrides Photodétérioration Revêtements -- Effets du rayonnement ultraviolet Revêtements organiques Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : Silicone-modified epoxy polymeric matrix was successfully fabricated and reinforced with 1–2 wt% SiO2, TiO2, and TiSiO4 nanoparticles. Fourier-transform infrared spectroscopy, contact angle measurements, differential scanning calorimetry, and field-emission scanning electron microscopy together with energy-dispersive X-ray spectroscopy were employed to investigate different characteristics of the prepared coatings. To simulate operating conditions, all samples were characterized via electrochemical impedance spectroscopy (EIS) after being subjected to different conditions. Corrosion under static conditions, in which the samples were exposed to a static electrolyte without further change in other parameters, was investigated. Furthermore, to study the effects of ultraviolet (UV) radiation in accelerating the degradation of the coatings, samples were characterized after being subjected to UV while immersed statically in the electrolyte. Additionally, the corrosion protection performance was investigated after subjecting the coated substrates to dynamic conditions involving continuous movement of the sample in the electrolyte, simulating continuous wear of the coated surfaces. Compared with the static condition, the EIS results revealed the vital role of the silicone resin and nanoparticles in improving the stability of the coating film against corrosion degradation in the presence of UV radiation, while poor performance in dynamic condition was recorded for all the coating systems. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials - Coating preparation - CHARACTERIZATION : Fourier-transform infrared (FTIR) spectroscopy - Contact angle (CA) measurements - Differential scanning calorimetry (DSC) - Surface morphology analysis - Electrochemical impedance spectroscopy ( EIS) - RESULTS AND DISCUSSION : Fourier-transform infrared (FTIR) spectroscopy - Contact angle (CA) measurements - Differential scanning calorimetry (DSC) - Surface morphology - Electrochemical impedance spectroscopy (EIS) - Static condition - Ultraviolet (UV) condition - Dynamic testing - Assessment of EIS results in static, UV, and dynamic conditions DOI : 10.1007/s11998-017-0038-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0038-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31127 [article]

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Formulation and characterization of hybrid polymeric/ZnO nanocomposite coatings with remarkable anti-corrosion and hydrophobic characteristics / Sh. Ammar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 5 (09/2016) . - p. 921-930 Titre : Formulation and characterization of hybrid polymeric/ZnO nanocomposite coatings with remarkable anti-corrosion and hydrophobic characteristics Type de document : texte imprimé Auteurs : Sh. Ammar, Auteur ; K. Ramesh, Auteur ; B. Vengadaesvaran, Auteur ; S. Ramesh, Auteur ; A. K. Arof, Auteur Année de publication : 2016 Article en page(s) : p. 921-930 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Caractérisation Hydrophobie Matériaux hybrides Morphologie (matériaux) Nanoparticules Oxyde de zinc Polyacryliques Revêtements protecteurs Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : A simple chemical technique has been used to prepare core–shell extender pigments based on Nigerian indigenous clays as core and titanium dioxide as shell. The prepared core–shell extender pigments were characterized using X-ray fluorescence and scanning electron microscopy. The physico-chemical properties of these extender pigments were also evaluated according to ASTM measurements. The study showed that the prepared core–shell pigments were nontoxic and environmentally friendly. They are of low cost and can be incorporated in semi-gloss paints, paper, rubber, and plastic composites without much effect on the volume. The characteristics of these pigments showed that they combine the properties of both their precursors, and have the potential to overcome their disadvantages, e.g., low hiding power of clays and photochemical activity of titanium dioxide. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials and sample preparation - Characterization - RESULTS AND DISCUSSION : Fourier transform infrared spectroscopy (FTIR) - Morphological studies (FESEM and EDX) - Contact angle (CA) - Electrochemical impedance spectroscopy (EIS) DOI : 10.1007/s11998-016-9799-z En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9799-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27131 [article]

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