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Ajouter le résultat dans votre panier Affiner la rechercheCorrosion resistance of siliconized-epoxy coatings / S. Ananda Kumar in EUROPEAN COATINGS JOURNAL (ECJ), N° 5/99 (05/1999)
Titre : Corrosion resistance of siliconized-epoxy coatings Type de document : texte imprimé Auteurs : S. Ananda Kumar, Auteur ; M. Alagar, Auteur ; V. Mohan, Auteur Année de publication : 1999 Article en page(s) : p. 64-67 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Though number of paint systems are available based on epoxy resin for submerged structures, they are not satisfactory from the view point of prevention of corrosion due to foulants. Hence, in the present investigation a new hybrid coating based on siliconised-epoxy interpenetrating polymeric networks have been developed and their corrosion resistant behaviour was studied by weight loss method. In the present study, the commercially available epoxy system GY 250 has been modified by siloxane grafting and the modified resin system is cured by two different curatives viz., aliphatic amine and polyamidoamine. The siliconized epoxy systems cured with aliphatic amine exhibit better corrosion protection due to high cross link density as well as better hydrophobic nature than the system cured with polyamidoamine. For example the epoxy grafted with 10% siloxane gives 98-99% corrosion protection to steel surface, whereas pure epoxy system gives only 80-92% corrosion protection under similar conditions of test. Further, the addition of zinc powder to the coating formulation enhances higher corrosion protection. Note de contenu : - Polymeric coatings play a vital role of surface protection techniques
- Surface preparation of test specimen
- Preparation of siliconozed-epoxy interpenetrating coating systems
- Standardization of siloxane into epoxy system
- Application of coating over test specimens
- Calculation of weight loss
- calculation of blank loss (X)
- Maximum corrosion protection with siliconized-epoxy coating system filled with 25% of zinc powder
- Siloxane improves the steel surfaceEn ligne : https://drive.google.com/file/d/1nHJZgMzzrospxI0wttLYq1nhjjxH96wi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11190
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5/99 (05/1999) . - p. 64-67[article]Réservation
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Titre : Evaluation of siliconized epoxy coatings by electrochemical impedance spectroscopy Type de document : texte imprimé Auteurs : S. Ananda Kumar, Auteur ; M. Alagar, Auteur ; K. P. O. Mahesh, Auteur ; T. S. N. Sankara Narayanan, Auteur ; V. Mohan, Auteur Année de publication : 2000 Article en page(s) : p. 64-77 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Solvent free siloxane modified epoxy coatings were developed by interpenetrating technique. The corrosion resistant behaviour of siliconized epoxy coating systems with 25% zinc powder cured with four different curatives has been investigated by Electrochemical Impedance Spectroscopy (EIS). The results are comparable with those obtained from neutral salt spray tests. The siloxane (10%) modified epoxy coating system A with 25% zinc powder cured by hexamethylene diamine offers maximum corrosion protection to steel surface. Note de contenu : - Preparation of siloxane modified epoxy coating system
- Preparation of prepolymer mix
- Siloxane introduction into epoxy coating system
- Electrode preparation
- Impedance measurements
- Formation of a low frequency diffusion tail confirms that the corrosion process is a diffusion controlled reaction
- The resistance and the capacitance values of coating systems A, B, C and D are in the range of 10^9 ohm.cm² and 10^-10 F
- Better corrosion protection of steel surfaces
- The Bode plot can be explained with the help of threshold frequency limits and the variation of logarithmic values of impedance with frequency
- The data analysis of the coating systems A,B,C, and D confirms the existence of a single constantPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10994
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4/00 (04/2000) . - p. 64-77[article]Réservation
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Titre : Novel siliconized-epoxy interpenetrating coating Type de document : texte imprimé Auteurs : S. Ananda Kumar, Auteur ; M. Alagar, Auteur ; K. P. O. Mahesh, Auteur ; V. Mohan, Auteur Année de publication : 1999 Article en page(s) : p. 84-88 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Interpenetrating polymer networks (IPN) are novel types of polymer blends and they possess excellent physicochemical properties suitable for high performance coatings. In the present work a novel siliconized-epoxy coating system was developed by interpenetrating technique. The effect of siloxane introduction into epoxy resin and nature of curatives on the corrosion resistance characteristics towards steel specimen were studied by weight loss and electrochemical potential measurements. It was observed that, the siloxane incorporation enhances the corrosion resistant properties and reduce moisture absorption. It was also observed that the aromatic polyamineadduct cured siloxane modified epoxy coating system with 25% zinc powder exhibits better corrosion resistance than the polyamidoamine cured system. Note de contenu : - Status quo
- Siloxane polymeric component is suitable to modify epoxy resin
- Experimental: - Surface preparation of test specimen - Preparation of siloxane modified epoxy coating system - Preparation of prepolymer mix - Siloxane introduction into epoxy coating system - Application of coating over test specimen - Weight loss method - Calculation of weight loss a raw specimen (x) - Electrochemical potential measurement
- Minimum weight loss and maximum corrosion protection with siloxane modified epoxy
- Cured by aromatic polyamineadduct better than polyamidoamine cured system
- Incorporation of siloxane as well as zinc powder enhances corrosion protection behaviour
- Aromatic nature of the curative minimizes the oxidation of steel specimenEn ligne : https://drive.google.com/file/d/1L6MR7jFmxogva2mCVG5UlfsNjV4Y4Pgb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11208
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 9/99 (09/1999) . - p. 84-88[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000609 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Siliconized epoxy : anticorrosive and antifouling paint Type de document : texte imprimé Auteurs : S. Ananda Kumar, Auteur ; M. Alagar, Auteur Année de publication : 2002 Article en page(s) : p. 39-50 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The use of epoxy resin for high performance coating applications was restricted mainly due to its deficient characteristics like poor Impact strength, high rigidity and high moisture absorbing nature. The deficient characteristics can be avoided by the incorporation of siloxane in to the epoxy skeleton by interpenetrating polymer network mechanism (IPN) there by enhancing its properties ideally suitable for high performance anticorrosive and antifouling coating applications. Note de contenu : - Modifiers improve its thermal and mechanical properties
- Surface preparation of test specimens
- How to get to hydroxyl terminated polydimethyl siloxane
- Determination of the viscosity
- Preparation of siliconized epoxy prepolymer mix
- Preparation of siloxane modified epoxy coating system
- How to introduce siloxane into epoxy coating system
- Application over test specimen
- Antifouling studies at the coast of Bay of Bengal, India
- Spectral analysis : interpenetrating network in two steps
-Polarization : Both coatings (AX4 and BX4) demonstrate good corrosion resistance
-Impedance study reveals the corrosion protective mechanism
- An equivalent electrical circuit model is proposed to explain the corrosion behaviour
- Dead barnacles over bare steel and coated specimens induce pitting and crevice corrosion
- Siliconization and incorporation of zinc improve the resistance of steel surface against corrosionEn ligne : https://drive.google.com/file/d/1Je6hwAWzXkeej64yOtFlsplSheykhh2r/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10775
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5/02 (05/2002) . - p. 39-50[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000643 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Siliconized epoxy coatings Type de document : texte imprimé Auteurs : S. Ananda Kumar, Auteur ; M. Alagar, Auteur Année de publication : 2001 Article en page(s) : p. 152-159 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Unmodified epoxy and siliconized epoxy coating systems (in the absence and in the presence of 15% zinc powder) were developed by using epoxy resin GY 250 (DGEBA) and hydroxyl terminated polydimethylsiloxane with γ-aminopropyltriethoxysilane as crosslinker and dibutyltindilaurate as catalyst. Hexamethylenediamine (A), polyamidoamine (B), aromatic polyamine adduct I (C) and aromatic polyamine adduct II (D) were used as curing agents for unmodified epoxy and siliconized epoxy coating systems. Physical properties such as coating thickness (DFT), adhesion, water absorption, degree of rusting and blistering of unmodified epoxy and siliconized epoxy coating systems (in the absence and in the presence of 25% zinc powder) were studied. The effect of siloxane introduction and the addition of zinc powder (25%) into the unmodified epoxy coating systems were also studied. Similarly, the mechanical properties such as abrasion resistance, hardness and Impact strength of unmodified epoxy and siliconized epoxy coating systems with the addition of 25% zinc powder were discussed. It is observed from the studies, that the incorporation of siloxane in to the unmodified epoxy resin enhances the adhesion to steel specimens, reduces water absorption, degree of rusting and degree of blistering of steel specimens. Further, the addition of 25% zinc powder to the unmodified epoxy and siliconized epoxy coating systems improves the physical properties of the coating systems. Similarly, the incorporation of siloxane in to the unmodified epoxy resin Improves the impact strength, abrasion resistance and reduces the hardness values. Addition of 25% zinc powder to the unmodified epoxy and sillconized epoxy coating systems further improves the impact strength, abrasion resistance and hardness. Note de contenu : - Preparation of prepolymer mix
- Preparation of siliconized epoxy coating system
- Physical properties of coatings
- Mechanical properties of the coating systems
- Correlation between electrochemical and physicomechanical dataEn ligne : https://drive.google.com/file/d/1UEbgZZOvXkA-_JnLsPUAXN_SiXuCqKSY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10972
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4/01 (04/2001) . - p. 152-159[article]Réservation
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