Documents disponibles écrits par cet auteur

Evolution of corrosion protection performance of hybrid silica based sol–gel nanocoatings by doping inorganic inhibitor / N. Pirhady Tavandashti in Materials and corrosion, Vol. 62 N° 5 (Mai 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 5 (Mai 2011) . - pp. 411–415 Titre : Evolution of corrosion protection performance of hybrid silica based sol–gel nanocoatings by doping inorganic inhibitor Type de document : texte imprimé Auteurs : N. Pirhady Tavandashti, Auteur ; S. Sanjabi, Auteur ; T. Shahrabi, Auteur Année de publication : 2011 Article en page(s) : pp. 411–415 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Aluminium  alloy  Cerium  nitrate  Hybrid  coating  Impedance  spectroscopy  Sol–gel Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Silica based hybrid sol–gel coatings were developed to protect AA2024 alloy from corrosion. In order to have an active protection, cerium nitrate corrosion inhibitor was introduced into the coating system. The anti-corrosion properties of the coatings were evaluated by electrochemical impedance spectroscopy (EIS) and potentiodynamic scanning (PDS) methods. The structure of the films was studied by scanning electron microscopy (SEM) after corrosion. The results indicate that the improvement of the protection properties of the films occurred with immersion time. This would imply that cerium ions could reach the defects, hindering the corrosion reactions and thus reduces the corrosion rate. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905529/abstract [article] Evolution of corrosion protection performance of hybrid silica based sol–gel nanocoatings by doping inorganic inhibitor [texte imprimé] / N. Pirhady Tavandashti, Auteur ; S. Sanjabi, Auteur ; T. Shahrabi, Auteur . - 2011 . - pp. 411–415. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 5 (Mai 2011) . - pp. 411–415 Mots-clés : Aluminium  alloy  Cerium  nitrate  Hybrid  coating  Impedance  spectroscopy  Sol–gel Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Silica based hybrid sol–gel coatings were developed to protect AA2024 alloy from corrosion. In order to have an active protection, cerium nitrate corrosion inhibitor was introduced into the coating system. The anti-corrosion properties of the coatings were evaluated by electrochemical impedance spectroscopy (EIS) and potentiodynamic scanning (PDS) methods. The structure of the films was studied by scanning electron microscopy (SEM) after corrosion. The results indicate that the improvement of the protection properties of the films occurred with immersion time. This would imply that cerium ions could reach the defects, hindering the corrosion reactions and thus reduces the corrosion rate. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905529/abstract

Synthesis and mechanical properties of nickel-titania composite coatings / S. A. Lajevardi in Materials and corrosion, Vol. 62 N° 1 (Janvier 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 1 (Janvier 2011) . - pp. 29–34 Titre : Synthesis and mechanical properties of nickel-titania composite coatings Type de document : texte imprimé Auteurs : S. A. Lajevardi, Auteur ; T. Shahrabi, Auteur ; V. Hasannaeimi, Auteur Année de publication : 2011 Article en page(s) : pp. 29–34 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Composite  coatings  Electrocodeposition  Nickel  Titania  particles  Ultrasonic  waves Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Nickel-titania composite coatings were prepared under direct current conditions by codeposition of nano titania particles (21 nm) and nickel from a nickel Watts type bath. Current density, concentration of titania particles, effect of agitation, and ultrasonic waves were investigated and the optimum values of these parameters for reaching to maximum vol% of titania particles in the coating were determined. Microhardness of these coatings was investigated by Vickers method and their morphological properties and chemical composition were studied by SEM and EDS analysis, respectively. The results showed that optimal values of current density, concentration of particles, and agitation rate exist that maximum percent of particles codeposited in the coating. Also it is demonstrated that using the ultrasonic waves dramatically decrease the agglomeration of particles in the coating. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905467/abstract [article] Synthesis and mechanical properties of nickel-titania composite coatings [texte imprimé] / S. A. Lajevardi, Auteur ; T. Shahrabi, Auteur ; V. Hasannaeimi, Auteur . - 2011 . - pp. 29–34. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 1 (Janvier 2011) . - pp. 29–34 Mots-clés : Composite  coatings  Electrocodeposition  Nickel  Titania  particles  Ultrasonic  waves Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Nickel-titania composite coatings were prepared under direct current conditions by codeposition of nano titania particles (21 nm) and nickel from a nickel Watts type bath. Current density, concentration of titania particles, effect of agitation, and ultrasonic waves were investigated and the optimum values of these parameters for reaching to maximum vol% of titania particles in the coating were determined. Microhardness of these coatings was investigated by Vickers method and their morphological properties and chemical composition were studied by SEM and EDS analysis, respectively. The results showed that optimal values of current density, concentration of particles, and agitation rate exist that maximum percent of particles codeposited in the coating. Also it is demonstrated that using the ultrasonic waves dramatically decrease the agglomeration of particles in the coating. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905467/abstract