Corrosion behavior of nanohybrid titania–silica composite coating on phosphated steel sheet / Akshay Kumar Guin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 1 (01/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 1 (01/2012) . - p. 97–106 Titre : Corrosion behavior of nanohybrid titania–silica composite coating on phosphated steel sheet Type de document : texte imprimé Auteurs : Akshay Kumar Guin, Auteur ; Sanjay K. Nayak, Auteur ; T. K. Rout, Auteur ; N. Bandyopadhyay, Auteur ; D. K. Sengupta, Auteur Année de publication : 2012 Article en page(s) : p. 97–106 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corrosion Revêtements:Peinture Sol-gel, Procédé Spectroscopie d'impédance électrochimique Titane Index. décimale : 667.9 Revêtements et enduits Résumé : Corrosion resistance behavior of sol–gel-derived organic–inorganic nanotitania–silica composite coatings was studied. Hybrid sol was prepared from Ti-isopropoxide and N-phenyl-3-aminopropyl triethoxy silane. The structure, morphology, and properties of the coating were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermo gravimetric analysis. The corrosion performances of the sol–gel-coated samples were investigated by electrochemical impedance spectroscopy (EIS) and standard salt spray tests. The hybrid coatings were found to be dense, more uniform, and defect free. In addition, the coatings also proved its excellent corrosion protection on phosphated steel sheet. Note de contenu : - EXPERIMENTAL : Preparation of sol–gel solution - IR spectroscopy study - Particle size study - Contact angle measurement - Differential scanning calorimetry (DSC) study - Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) - Surface morphology analysis - Cupping test - Potentiodynamic polarization and electrochemical impedance spectroscopy study - Salt spray test - RESULTS AND DISCUSSION : FTIR study - Particle size study - Contact angle study - Thermogravimetric study - Surface morphology study - Cupping test - Corrosion resistance study - EIS study - Polarization study DOI : 10.1007/s11998-011-9321-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-011-9321-6.pdf?pdf=button Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14359 [article]

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Service life prediction of organic coatings: electrochemical impedance spectroscopy vs actual service life / Subrahmanya Shreepathi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 2 (03/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 2 (03/2011) . - p. 191-200 Titre : Service life prediction of organic coatings: electrochemical impedance spectroscopy vs actual service life Type de document : texte imprimé Auteurs : Subrahmanya Shreepathi, Auteur ; Akshay Kumar Guin, Auteur ; Shrikant M. Naik, Auteur ; Mohan Rao Vattipalli, Auteur Année de publication : 2011 Article en page(s) : p. 191-200 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Durée de vie (Ingénierie) Electrochimie Essais accélérés (technologie) Essais de brouillard salin Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : Electrochemical impedance spectroscopy (EIS) is used to derive an expression for predicting the service life of organic coating in a C4-type environment (industrial and costal areas with moderate salinity) as defined in ISO 12944 standard for paints and varnishes—corrosion protection of steel structures by protective paint systems. Three coating systems with a record of 2, 5, and 10 years of durability were selected for the study. The selection was also based on proven composition and dry film thickness (DFT) of the coatings as per ISO 12944. Electrochemical impedance measurements of the paint-coated panels were carried out by exposing the coated mild steel panels without scribe in different corrosive environments such as immersion in NaCl solution, neutral salt spray, etc. Neutral salt spray exposure was found to be the most severe corrosive environment among all the three coating systems. In most of the cases, EIS gave early indication of coating failure when compared to visual defects such as blistering and over-film corrosion. Note de contenu : - EXPERIMENTAL : System 1 : Low durable system for normal inland System 2 : Mdium durable system for coastal environment - RESULTS AND DISCUSSION : Exposure to immersion in 3.5 % NaCl Exposure to ASTM B117 (neutral salt spray) ASTM G85 (Prohesion cabinet test) ASTM D5894 (cyclic corrosion test) Immersionin 10 % HS2O4 and NaOH Service life prediction DOI : 10.1007/s11998-010-9299-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9299-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11361 [article]

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