Comparative performance of coating system on steel surface at laboratory and Chennai naval base environment / M. Selvaraj in PAINTINDIA, Vol. LIII, N° 12 (12/2003)

[article]  inPAINTINDIA > Vol. LIII, N° 12 (12/2003) . - p. 49-54 Titre : Comparative performance of coating system on steel surface at laboratory and Chennai naval base environment Type de document : texte imprimé Auteurs : M. Selvaraj, Auteur ; M. Natesan, Auteur ; K. Maruthan, Auteur ; P. Jayakrishnan, Auteur Année de publication : 2003 Article en page(s) : p. 49-54 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Maintenance coating systems viz. vinyl, epoxy - polyurethane and polyurethane were coated on wire brushed steel surface and exposed at Chennai naval base for 18 months and in a salt spray chamber for 720 hrs. After this duration, the panels were removed and subjected to impedance measurement studies in 0.5 M sodium chloride solution. The photographs of salt spray chamber exposed panels and those exposed in atmosphere indicate that the latter gets highly corroded when compared to the panels in the salt spray chamber. This is mainly due to the atmospheric corrodant present in the air in addition to the marine environment. The AC impedance measurement shows that the vinyl and epoxy-polyurethane coating system exhibited 109 ohm-cm2 resistance even after 720 hrs salt spray and a 18 month exposure at the navel base. But the resistance produced by the polyurethane system is in the order of 106 ohm-cm2 and 104 ohm.cm2, which shows comparatively poor protective property of this system. This study indicates that better correlation is possible between exposure studies and the electrochemical methods of evaluating the coating systems. The studies further conclude that vinyl and epoxy-polyurethane coating systems can be used as maintenance coating system for steel structures at the navel base environment in Chennai. Note de contenu : - Experimental : a. Epoxy-polyamide, urethane system b. Vinyl polymer system c. Polyurethane system - Evaluation of the coating system : 1. Atmospheric exposure study 2. Salt spray accelerated test 3. Electrochemical A.C. impedance measurements - Results and discussion : - Field exposures and salt spray - Impedance measurement Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12205 [article]

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Corrosion protection and thermal functions of carbon-filled silicone coatings for steel substrates / K. Maruthan in SURFACE COATINGS INTERNATIONAL. PART A : COATINGS JOURNAL, Vol. 88, A07 (09/2005)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART A : COATINGS JOURNAL > Vol. 88, A07 (09/2005) . - p. 273-276 Titre : Corrosion protection and thermal functions of carbon-filled silicone coatings for steel substrates Type de document : texte imprimé Auteurs : K. Maruthan, Auteur ; M. Selvaraj, Auteur ; P. Jayakrishnan, Auteur Année de publication : 2005 Article en page(s) : p. 273-276 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : During the last two decades, research work has shown that electrically conductive coatings can also be used to inhibit the corrosion of metals. Nickel flake pigments show a slight advantage over shperical pigments by achieving conductivity through particle-to-particle contact at much lower pigment loading percentages. Similarly, for a conductive nickel flake coating system to protect the metals from different environments relies upon the resin system in the composition. En ligne : https://drive.google.com/file/d/180XBXON2iCX-GWm2WCZi_BwjA5St2nPY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16386 [article]

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Synthesis and characterization of nanosized titanium dioxide and silicon dioxide for corrosion resistance applications / A. M. Kamalan Kirubaharan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 2 (03/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 2 (03/2012) . - p. 163-170 Titre : Synthesis and characterization of nanosized titanium dioxide and silicon dioxide for corrosion resistance applications Type de document : texte imprimé Auteurs : A. M. Kamalan Kirubaharan, Auteur ; M. Selvaraj, Auteur ; K. Maruthan, Auteur ; D. Jeyakumar, Auteur Année de publication : 2012 Article en page(s) : p. 163-170 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Caractérisation Diffractométrie de rayons X Dioxyde de silicium Dioxyde de titane Fourier, Spectroscopie infrarouge à transformée de Matériaux hybrides Nanoparticules -- Synthèse Polypyrroles Réseaux polymères 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). Sol-gel, Procédé Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : We are reporting the preparation and characterization of nano-titanium dioxide and silica. The corrosion resistance performance of these nanopigments in silicone as well as silicone–polypyrrole Interpenetrating Polymer Network has been evaluated by impedance spectroscopy. The capacitance and resistance exerted by this nanocomposite coating were compared with the microcomposite coating and found that the nanocomposite coatings has the resistance in the order of 108 ? cm2 in 3% sodium chloride solution, which is more than the microcomposite coating. The comparison of heat resistance performance of these composite coatings indicates that nanocomposite coatings exhibit higher heat resistance property than the microcomposite coatings. Note de contenu : - MATERIALS AND METHODS : Preparation of nano-TiO2 - Preparation of trifluoroacetic acid-capped TiO2 - CHARACTERIZATION OF NANOPARTICLES : X-ray diffraction method - Transmission electron microscopy - Preparation of micropigmented coatings - Preparation of nanopigmented coatings - Preparation of painted panels - EVOLUTION OF COATED SPECIMEN : Electrochemical impedance spectroscopy (EIS) measurements - Heat resistance test - RESULTS AND DISCUSSION : Characterization of nano-titanium dioxide and nano-silica - X-ray diffraction of TiO2 and SiO2 nanoparticles - TEM analysis - Evaluation of coated specimen by EIS study - High temperature resistance properties DOI : 10.1007/s11998-009-9226-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-009-9226-9.pdf?pdf=button Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14367 [article]

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