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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Optimization of phosphate coating properties on steel sheet for superior paint performance / Nitu Rani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 5 (09/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 5 (09/2012) . - p. 629-636 Titre : Optimization of phosphate coating properties on steel sheet for superior paint performance Type de document : texte imprimé Auteurs : Nitu Rani, Auteur ; Arun K. Singh, Auteur ; Sarfaraz Alam, Auteur ; N. Bandyopadhyay, Auteur ; M. B. Denys, Auteur Année de publication : 2012 Article en page(s) : p. 629-636 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Anticorrosion Dépôt électrolytique Phosphate de zinc Revêtements Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : The adhesion of electrodeposition (ED) paint on steel sheets for automobiles is highly influenced by the properties of the zinc phosphate coating which is used to improve its corrosion resistance. In the present study, a steel surface was pretreated with two types of zinc phosphate formulations followed by ED painting. The surface morphology, crystal plane, and porosity properties of phosphate coating on steel samples were studied by scanning electron microscope, X-ray diffraction, and electron probe microanalyzer, respectively. The corrosion resistance of painted samples was evaluated by an accelerated corrosion test as well as by electrochemical techniques like cathodic disbonding and AC–DC–AC tests. The phosphate coating enriched with a phosphophyllite structure showed small globular crystals with less porosity, whereas a hopeite structure showed coarse crystals with high porosity and comparatively thicker coating. The maximum corrosion resistance was observed in the painted sample, where the phosphate coating comprised a phosphophyllite structure. On the other hand, the painted samples phosphated with a predominantly hopeite structure showed inferior corrosion resistance performance. The unphosphated sample showed severe degradation in paint adhesion and corrosion resistance, which substantiates the importance of phosphate pretreatment. Note de contenu : - EXPERIMENTAL : Sample preparation - Phosphate coating evaluation - Corrosion resistance performance of ED coating - RESULTS AND DISCUSSION : Properties of phosphabe bath - Properties of phosphate coating - Corrosion resistance properties of ED-painted samples DOI : 10.1007/s11998-012-9395-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9395-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16034 [article]

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