Cathodic electrodepostion of epoxy resin system / P. Jayakrishnan in PAINTINDIA, Vol. LI, N° 9 (09/2001)

[article]  inPAINTINDIA > Vol. LI, N° 9 (09/2001) . - p. 43-48 Titre : Cathodic electrodepostion of epoxy resin system Type de document : texte imprimé Auteurs : P. Jayakrishnan, Auteur Année de publication : 2001 Article en page(s) : p. 43-48 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Etude  expérimentale'  'Procédé  revêtement'  Peinturage  'Dépôt  électrophorèse'  Cataphorèse  'Peinture  anticorrosion'  eau'  'Solution  aqueuse'  Liant  'Epoxyde  résine'  Préparation Index. décimale : 667.9 Revêtements et enduits Résumé : Electrodeposition of paint has become one of the effective methods of application of coatings. It has several advantages over conventional paint application methods, the most important one being the control of pollution, since water is the main solvent used in the process in place of toxic organic solvents. Both anodic and cathodic processes have been developed, but the latter has clear cut advantages over the former, because, in cathodic process, the substrate dissolution can be avoided, which helps in eliminating the threat of coating discoloration and also the bath instability. Epoxy resins are well known for their corrosion protective properties. In the present work, water soluble epoxy resin is prepared by modifying with amine for getting cathodic systems. The resin, on dissolution in water by adding organic acids, could be cathodically deposited. The studies made with the cathodic epoxy resin with and without pigmentation and also the evaluation of the electrocoating are detailed in this paper. Note de contenu : - Effect of conductivity of the resin solution and deposition characteristics - Effect of resin concentration - Effect of applied voltage - Effect of pH - Characteristics of electrocoating bath - Potentiodynamic electrodeposition studies - Evaluation of the properties of the coatings Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12458 [article]

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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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Electrodeposition of epoxy resins from aqueous system / P. Jayakrishnan in PAINTINDIA, Vol. XLVII, N° 1 (01/1997)

[article]  inPAINTINDIA > Vol. XLVII, N° 1 (01/1997) . - p. 43-46 Titre : Electrodeposition of epoxy resins from aqueous system Type de document : texte imprimé Auteurs : P. Jayakrishnan, Auteur Année de publication : 1997 Article en page(s) : p. 43-46 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinturage  'Dépôt  électrophorèse'  'Peinture  eau'  'Epoxyde  résine' Index. décimale : 667.9 Revêtements et enduits Résumé : Electropainting is a versatile technology with several unique characteristics. The technology has now developed to a full fledged one which is used especially for primer application. But it can also be used as one coat finish where such coatings find application. Both anodic and cathodic systems have been developed and even now both are being used taking into consideration the essential properties of the coating that is to be pressed into service. For this purpose several resin systems are used and depending on the properties required the system can be chosen. Epoxy resins are well known for their corrosion protective properties. They are widely used as primers due to their good protective action against marine and alkaline environment. It offers sufficiently good protection against acid also though not as good as that against alkali. The author in this paper has described some of the experiences with the epoxy ester resin deposition over steel from aqueous bath especially regarding the bath characteristics and some of the properties of the coatings. Note de contenu : - Evaluation of electrocoating - Bond strength Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13203 [article]

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Formulation and performance elevation of epoxy urethane coating / S. Syed Azim in PAINTINDIA, Vol. XLIX, N° 4 (04/1999)

[article]  inPAINTINDIA > Vol. XLIX, N° 4 (04/1999) . - p. 115-118 Titre : Formulation and performance elevation of epoxy urethane coating Type de document : texte imprimé Auteurs : S. Syed Azim, Auteur ; P. Jayakrishnan, Auteur ; N. S. Rengaswamy, Auteur Année de publication : 1999 Article en page(s) : p. 115-118 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau  revêtement'  'Peinture  anticorrosion'  Liant  'Résine  époxyde'  modifié'  Polyuréthane  Formulation  Performance  'Etude  expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : Aliphatic polyurethane coatings are well known for their extremely good weather resistance. However the cost of the imported raw materials make them for selective use in controlling marine and industrial corrosion of steel structures. In this present study an attempt is made to develop a coating material with good weather resistance as well as corrosion resistance. An epoxy resin cured with different ratios of aliphatic polyisocyanate was evaluated for its weather and corrosion resistance nature by conventional methods. The developed resin system was used to formulate a paint i.e. top coat and its performance was compared with the conventional epoxy polyamide paint and a conventional polyurethane paint. It was concluded that by reacting epoxy resin with aliphatic isocyanate one can get a cost effective, better performing top coat, which can be a good replacement for conventional aliphatic polyurethane topcoats. Note de contenu : - Evaluation of epoxy urethane paint Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12965 [article]

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Paint formulations for wet surfaces and underwater applications / M. Dhanalakshmi in PAINTINDIA, ANNUAL 1996 (1996)

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