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

The effect of TiO2 nanoparticle codeposition on microstructure and corrosion resistance of electroless Ni-P coating / M. Momenzadeh in Materials and corrosion, Vol. 63 N° 7 (Juillet 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 7 (Juillet 2012) . - pp. 614–619 Titre : The effect of TiO2 nanoparticle codeposition on microstructure and corrosion resistance of electroless Ni-P coating Type de document : texte imprimé Auteurs : M. Momenzadeh, Auteur ; S. Sanjabi, Auteur Année de publication : 2012 Article en page(s) : pp. 614–619 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : corrosion;  electroless;  microhardness;  Ni-P-TiO2  nanocomposite  coatings Résumé : Ni-P-TiO2 nanocomposite coatings with various contents of TiO2 nanoparticles were synthesized by adding TiO2 nanoparticles to Ni-P electroless plating solution. The effects of pH and anionic surfactant sodium dodecyl sulfate (SDS) on the chemical composition of Ni, P, and TiO2 in the coatings were investigated. Scanning electron microscope (SEM), energy dispersive spectrometer (EDX), and X-ray diffractometer (XRD) were used to characterize the morphology, composition, and crystal structure of deposited coatings, respectively. The hardness of nanocomposite coatings was improved greatly compared to Ni-P coating especially after heat treatment. After heat treatment at 400 °C for 1 h, an increase in microhardness was observed for heat-treated Ni-P coatings. The hardness was increased from 805 to 1050 Hv for Ni-P-TiO2 coating deposited at 9 g/LTiO2 concentration in the bath. The corrosion resistance of Ni-P-TiO2 coating was significantly increased compared to Ni-P coatings by incorporation of TiO2 nanoparticle. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005985/abstract [article] The effect of TiO2 nanoparticle codeposition on microstructure and corrosion resistance of electroless Ni-P coating [texte imprimé] / M. Momenzadeh, Auteur ; S. Sanjabi, Auteur . - 2012 . - pp. 614–619. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 7 (Juillet 2012) . - pp. 614–619 Mots-clés : corrosion;  electroless;  microhardness;  Ni-P-TiO2  nanocomposite  coatings Résumé : Ni-P-TiO2 nanocomposite coatings with various contents of TiO2 nanoparticles were synthesized by adding TiO2 nanoparticles to Ni-P electroless plating solution. The effects of pH and anionic surfactant sodium dodecyl sulfate (SDS) on the chemical composition of Ni, P, and TiO2 in the coatings were investigated. Scanning electron microscope (SEM), energy dispersive spectrometer (EDX), and X-ray diffractometer (XRD) were used to characterize the morphology, composition, and crystal structure of deposited coatings, respectively. The hardness of nanocomposite coatings was improved greatly compared to Ni-P coating especially after heat treatment. After heat treatment at 400 °C for 1 h, an increase in microhardness was observed for heat-treated Ni-P coatings. The hardness was increased from 805 to 1050 Hv for Ni-P-TiO2 coating deposited at 9 g/LTiO2 concentration in the bath. The corrosion resistance of Ni-P-TiO2 coating was significantly increased compared to Ni-P coatings by incorporation of TiO2 nanoparticle. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005985/abstract

The morphology and corrosion resistance of electrodeposited Co-TiO2 nanocomposite coatings / S. Sanjabi in Materials and corrosion, Vol. 63 N° 8 (Août 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 8 (Août 2012) . - pp. 695–702 Titre : The morphology and corrosion resistance of electrodeposited Co-TiO2 nanocomposite coatings Type de document : texte imprimé Auteurs : S. Sanjabi, Auteur ; A. Shirani, Auteur Année de publication : 2013 Article en page(s) : pp. 695–702 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Corrosion  behavior;  Co-TiO2;  electrodeposition;  nanocomposite  coatings Résumé : Co-TiO2 nanocomposite coatings with various contents of TiO2 nanoparticles were prepared by electrodeposition in Co sulfate plating bath containing TiO2 nanoparticles. The influence of the TiO2 nanoparticles concentration in the bath, of the current density and of sodium dodecyle sulfate (SDS) as anionic surfactant on the morphology, composition, texture, roughness, and microhardness of the coatings was investigated. The morphology and composition of coatings were studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The phase structure of coatings was analyzed by X-ray diffraction (XRD). The results showed that the maximum codeposition of TiO2 nanoparticles in Co matrix was around 4.5 vol% obtained in 60 g/L TiO2 in the bath, 30 mA/cm2 and 0.15 g/L SDS. The microhardness of coatings was increased up to 504 Hv by increasing TiO2 concentration in the bath to 60 g/L TiO2. The electrochemistry tests including potentiodynamic polarization and impedance spectroscopy revealed that by addition of TiO2 into Co matrix, the corrosion current density, polarization resistance, and charge transfer resistance of Co-TiO2 coating were increased compared with Co coating. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106087/abstract [article] The morphology and corrosion resistance of electrodeposited Co-TiO2 nanocomposite coatings [texte imprimé] / S. Sanjabi, Auteur ; A. Shirani, Auteur . - 2013 . - pp. 695–702. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 8 (Août 2012) . - pp. 695–702 Mots-clés : Corrosion  behavior;  Co-TiO2;  electrodeposition;  nanocomposite  coatings Résumé : Co-TiO2 nanocomposite coatings with various contents of TiO2 nanoparticles were prepared by electrodeposition in Co sulfate plating bath containing TiO2 nanoparticles. The influence of the TiO2 nanoparticles concentration in the bath, of the current density and of sodium dodecyle sulfate (SDS) as anionic surfactant on the morphology, composition, texture, roughness, and microhardness of the coatings was investigated. The morphology and composition of coatings were studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The phase structure of coatings was analyzed by X-ray diffraction (XRD). The results showed that the maximum codeposition of TiO2 nanoparticles in Co matrix was around 4.5 vol% obtained in 60 g/L TiO2 in the bath, 30 mA/cm2 and 0.15 g/L SDS. The microhardness of coatings was increased up to 504 Hv by increasing TiO2 concentration in the bath to 60 g/L TiO2. The electrochemistry tests including potentiodynamic polarization and impedance spectroscopy revealed that by addition of TiO2 into Co matrix, the corrosion current density, polarization resistance, and charge transfer resistance of Co-TiO2 coating were increased compared with Co coating. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106087/abstract