Dépouillements

Effect of Mo content on electrochemical behaviour of TiMo alloys for dental applications / D. Mareci in Materials and corrosion, Vol. 61 N° 10 (Octobre 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 829–837 Titre : Effect of Mo content on electrochemical behaviour of TiMo alloys for dental applications Type de document : texte imprimé Auteurs : D. Mareci, Auteur ; R. Chelariu, Auteur ; D. M. Gordin, Auteur Année de publication : 2011 Article en page(s) : pp. 829–837 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Artificial  saliva;  commercial  mouthwash  solution;  EIS;  SEM;  TiMo  alloys Résumé : Corrosion behaviour of the new TiMo alloys together with the currently used metallic biomaterials commercial pure titanium (Cp-Ti) was investigated for dental applications. Ingots of composition Ti12Mo, Ti20Mo and Ti40Mo were synthesized by the cold crucible levitation melting (CCLM) technique. All the samples were examined using electrochemical techniques: open circuit potential, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) in two electrochemical media: artificial saliva and in commercial mouthwash solution with 450 ppm F− (Astera©, EU), at 25 °C. The passive behaviour for all the Ti samples is observed for artificial saliva and for commercial mouthwash solution. The results suggest a non-predominant fluoride effect on the passive behaviours of titanium samples. The EIS technique was applied to study the nature of the passive film formed on all the samples at various potentials in artificial saliva and in commercial mouthwash solution. Equivalent circuits (EC) were used to modelling EIS data, in order to characterize samples surface and better understanding the effect of Mo addition on the Cp-Ti. The TiMo alloys, with a dendritic arrangement, appear to possess superior corrosion resistance than the Cp-Ti in both electrochemical media. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005761/abstract [article] Effect of Mo content on electrochemical behaviour of TiMo alloys for dental applications [texte imprimé] / D. Mareci, Auteur ; R. Chelariu, Auteur ; D. M. Gordin, Auteur . - 2011 . - pp. 829–837. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 829–837 Mots-clés : Artificial  saliva;  commercial  mouthwash  solution;  EIS;  SEM;  TiMo  alloys Résumé : Corrosion behaviour of the new TiMo alloys together with the currently used metallic biomaterials commercial pure titanium (Cp-Ti) was investigated for dental applications. Ingots of composition Ti12Mo, Ti20Mo and Ti40Mo were synthesized by the cold crucible levitation melting (CCLM) technique. All the samples were examined using electrochemical techniques: open circuit potential, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) in two electrochemical media: artificial saliva and in commercial mouthwash solution with 450 ppm F− (Astera©, EU), at 25 °C. The passive behaviour for all the Ti samples is observed for artificial saliva and for commercial mouthwash solution. The results suggest a non-predominant fluoride effect on the passive behaviours of titanium samples. The EIS technique was applied to study the nature of the passive film formed on all the samples at various potentials in artificial saliva and in commercial mouthwash solution. Equivalent circuits (EC) were used to modelling EIS data, in order to characterize samples surface and better understanding the effect of Mo addition on the Cp-Ti. The TiMo alloys, with a dendritic arrangement, appear to possess superior corrosion resistance than the Cp-Ti in both electrochemical media. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005761/abstract

Oxidation kinetics of Y-doped FeCrAl-alloys in low and high pO2 gases / D. J. Young in Materials and corrosion, Vol. 61 N° 10 (Octobre 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 838–844 Titre : Oxidation kinetics of Y-doped FeCrAl-alloys in low and high pO2 gases Type de document : texte imprimé Auteurs : D. J. Young, Auteur ; D. Naumenko, Auteur ; L. Niewolak, Auteur Année de publication : 2011 Article en page(s) : pp. 838–844 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Alumina  scales;  grain  boundary  diffusion;  FeCrAlY  alloy;  oxidation  kinetics Résumé : A model Fe-20Cr-5Al-0.05Y alloy was oxidized in Ar-20%O2 and Ar-4%H2-7%H2O at 1200–1300 °C. Two-stage oxidation experiments using oxygen isotope tracers showed that inward oxygen diffusion was predominant in both gases, but more isotope exchange was observed in the H2/H2O gas reaction. The alumina scales formed in both gases were composed of columnar grains, the lateral size of which increased linearly with depth beneath the scale surface. Thermogravimetric measurement of oxygen uptake revealed kinetics which were intermediate to parabolic and cubic kinetic rate laws. A model based on grain boundary diffusion control coupled with competitive oxide grain growth accounts satisfactorily for the results when the requirement for a divergence-free flux within the scale is imposed. This treatment shows that the oxide grain boundary diffusion coefficient is lower when H2O is the oxidant. It is concluded that hydrogen slows the grain boundary diffusion process by altering the nature of the diffusing species. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905432/abstract [article] Oxidation kinetics of Y-doped FeCrAl-alloys in low and high pO2 gases [texte imprimé] / D. J. Young, Auteur ; D. Naumenko, Auteur ; L. Niewolak, Auteur . - 2011 . - pp. 838–844. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 838–844 Mots-clés : Alumina  scales;  grain  boundary  diffusion;  FeCrAlY  alloy;  oxidation  kinetics Résumé : A model Fe-20Cr-5Al-0.05Y alloy was oxidized in Ar-20%O2 and Ar-4%H2-7%H2O at 1200–1300 °C. Two-stage oxidation experiments using oxygen isotope tracers showed that inward oxygen diffusion was predominant in both gases, but more isotope exchange was observed in the H2/H2O gas reaction. The alumina scales formed in both gases were composed of columnar grains, the lateral size of which increased linearly with depth beneath the scale surface. Thermogravimetric measurement of oxygen uptake revealed kinetics which were intermediate to parabolic and cubic kinetic rate laws. A model based on grain boundary diffusion control coupled with competitive oxide grain growth accounts satisfactorily for the results when the requirement for a divergence-free flux within the scale is imposed. This treatment shows that the oxide grain boundary diffusion coefficient is lower when H2O is the oxidant. It is concluded that hydrogen slows the grain boundary diffusion process by altering the nature of the diffusing species. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905432/abstract

Influence of climatic factors in cyclic accelerated corrosion test towards the development of a reliable and repeatable accelerated corrosion test for the automotive industry / N. LeBozec in Materials and corrosion, Vol. 61 N° 10 (Octobre 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 845–851 Titre : Influence of climatic factors in cyclic accelerated corrosion test towards the development of a reliable and repeatable accelerated corrosion test for the automotive industry Type de document : texte imprimé Auteurs : N. LeBozec, Auteur ; D. Thierry, Auteur Année de publication : 2011 Article en page(s) : pp. 845–851 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Automotive;  testing Résumé : Two designs of experiments made of nine accelerated tests each were used in order to study the influence of a selection of important climatic parameters such as the concentration of NaCl, the drying level, the basic humidity cycle, the frequency of salt spray and the temperature. The accelerated corrosion tests were all performed using automatic chambers. Different automotive materials were selected in order to study the resistance to cosmetic corrosion, perforation corrosion and bi-metallic corrosion. For cosmetic materials, coated panels of cold rolled steel (CRS), zinc-coated steel and aluminium alloys were chosen. Perforation corrosion was investigated using crevice panels of CRS, zinc-coated steel or different grades of aluminium alloys. From the results, the influence of testing conditions on the cosmetic and perforation corrosion of different automotive materials was obtained. As an example, it was shown that an elevation of the temperature from 35 to 45 °C in the cyclic corrosion test increased the scribe creep on painted CRS and aluminium alloys while it has no significant effects on painted hot dip galvanized (HDG) panels. The results were also compared to that obtained after 2 years of exposure at a marine exposure site and on busses driving in area using de-icing salt. It was shown that one of the tests performed gives a good correlation to field results. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905497/abstract [article] Influence of climatic factors in cyclic accelerated corrosion test towards the development of a reliable and repeatable accelerated corrosion test for the automotive industry [texte imprimé] / N. LeBozec, Auteur ; D. Thierry, Auteur . - 2011 . - pp. 845–851. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 845–851 Mots-clés : Automotive;  testing Résumé : Two designs of experiments made of nine accelerated tests each were used in order to study the influence of a selection of important climatic parameters such as the concentration of NaCl, the drying level, the basic humidity cycle, the frequency of salt spray and the temperature. The accelerated corrosion tests were all performed using automatic chambers. Different automotive materials were selected in order to study the resistance to cosmetic corrosion, perforation corrosion and bi-metallic corrosion. For cosmetic materials, coated panels of cold rolled steel (CRS), zinc-coated steel and aluminium alloys were chosen. Perforation corrosion was investigated using crevice panels of CRS, zinc-coated steel or different grades of aluminium alloys. From the results, the influence of testing conditions on the cosmetic and perforation corrosion of different automotive materials was obtained. As an example, it was shown that an elevation of the temperature from 35 to 45 °C in the cyclic corrosion test increased the scribe creep on painted CRS and aluminium alloys while it has no significant effects on painted hot dip galvanized (HDG) panels. The results were also compared to that obtained after 2 years of exposure at a marine exposure site and on busses driving in area using de-icing salt. It was shown that one of the tests performed gives a good correlation to field results. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905497/abstract

Atmospheric corrosion of aluminium in the northern Taklamakan Desert environment / S. Sun in Materials and corrosion, Vol. 61 N° 10 (Octobre 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 852–859 Titre : Atmospheric corrosion of aluminium in the northern Taklamakan Desert environment Type de document : texte imprimé Auteurs : S. Sun, Auteur ; Q. Zheng, Auteur ; J. Wen, Auteur Année de publication : 2011 Article en page(s) : pp. 852–859 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Aluminium;  atmospheric  corrosion;  desert  environment;  weight  loss;  SEM Résumé : Atmospheric corrosion of aluminium in the northern Taklamakan Desert environment in China was investigated through the field exposure over a period of 2 years and the laboratory-accelerated test of dry-wet cycles. The results demonstrated that aluminium 1050 suffered serious atmospheric corrosion in the field exposure, which resulted from high soluble salt content and a high pH value of surface desert soil deposited on the samples. The soluble salt in surface desert soil could sufficiently decrease the relative humidity at which corrosion current density suddenly increased. Moreover, aluminium suffered more serious corrosion when there was more soluble salt content in surface desert soil. Among those salts, magnesium chloride caused the most serious corrosion attack. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905422/abstract [article] Atmospheric corrosion of aluminium in the northern Taklamakan Desert environment [texte imprimé] / S. Sun, Auteur ; Q. Zheng, Auteur ; J. Wen, Auteur . - 2011 . - pp. 852–859. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 852–859 Mots-clés : Aluminium;  atmospheric  corrosion;  desert  environment;  weight  loss;  SEM Résumé : Atmospheric corrosion of aluminium in the northern Taklamakan Desert environment in China was investigated through the field exposure over a period of 2 years and the laboratory-accelerated test of dry-wet cycles. The results demonstrated that aluminium 1050 suffered serious atmospheric corrosion in the field exposure, which resulted from high soluble salt content and a high pH value of surface desert soil deposited on the samples. The soluble salt in surface desert soil could sufficiently decrease the relative humidity at which corrosion current density suddenly increased. Moreover, aluminium suffered more serious corrosion when there was more soluble salt content in surface desert soil. Among those salts, magnesium chloride caused the most serious corrosion attack. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905422/abstract

Electrodeposition of zinc on AZ91D magnesium alloy pre-treated by stannate conversion coatings / S. Y. Zhang in Materials and corrosion, Vol. 61 N° 10 (Octobre 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 860–865 Titre : Electrodeposition of zinc on AZ91D magnesium alloy pre-treated by stannate conversion coatings Type de document : texte imprimé Auteurs : S. Y. Zhang, Auteur ; Q. Li, Auteur ; B. Chen, Auteur Année de publication : 2011 Article en page(s) : pp. 860–865 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : AZ91D  magnesium  alloy;  corrosion  resistance;  stannate  conversion  coating;  zinc  electrodeposition Résumé : A stannate chemical conversion process followed by an activation procedure was employed as the pre-treatment process for AZ91D magnesium alloy substrate. Zn was electroplated onto the pre-treated AZ91D magnesium alloy surface from pyrophosphate bath to improve the corrosion resistance and the solderability. The surface morphologies of conversion coating and zinc coating were examined with scanning electron microscope (SEM). The phase composition of conversion coating was investigated by X-ray diffraction (XRD). The electrochemical corrosion behavior of the coatings in the corrosive solution was investigated by potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). The experimental results showed that the activated stannate chemical conversion coating provided a suitable interface between zinc coating and the AZ91D magnesium alloy substrate. The corrosion resistance of the AZ91D substrate was improved by the zinc coating. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905435/abstract [article] Electrodeposition of zinc on AZ91D magnesium alloy pre-treated by stannate conversion coatings [texte imprimé] / S. Y. Zhang, Auteur ; Q. Li, Auteur ; B. Chen, Auteur . - 2011 . - pp. 860–865. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 860–865 Mots-clés : AZ91D  magnesium  alloy;  corrosion  resistance;  stannate  conversion  coating;  zinc  electrodeposition Résumé : A stannate chemical conversion process followed by an activation procedure was employed as the pre-treatment process for AZ91D magnesium alloy substrate. Zn was electroplated onto the pre-treated AZ91D magnesium alloy surface from pyrophosphate bath to improve the corrosion resistance and the solderability. The surface morphologies of conversion coating and zinc coating were examined with scanning electron microscope (SEM). The phase composition of conversion coating was investigated by X-ray diffraction (XRD). The electrochemical corrosion behavior of the coatings in the corrosive solution was investigated by potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). The experimental results showed that the activated stannate chemical conversion coating provided a suitable interface between zinc coating and the AZ91D magnesium alloy substrate. The corrosion resistance of the AZ91D substrate was improved by the zinc coating. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905435/abstract

Adsorption effect of 1-((2-hydroxynaphtalen-1-yl) (phenyl)methyl)urea on the carbon steel corrosion in hydrochloric acid media / S. M. A. Hosseini in Materials and corrosion, Vol. 61 N° 10 (Octobre 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 866–871 Titre : Adsorption effect of 1-((2-hydroxynaphtalen-1-yl) (phenyl)methyl)urea on the carbon steel corrosion in hydrochloric acid media Type de document : texte imprimé Auteurs : S. M. A. Hosseini, Auteur ; M. J. Bahrami, Auteur ; P. Pilvar, Auteur Année de publication : 2011 Article en page(s) : pp. 866–871 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Acid  corrosion  inhibitor;  adsorption  isotherm;  infrared  spectroscopy;  SEM;  thermodynamic  parameters Résumé : The adsorption effect of 1-((2-hydroxynaphtalen-1-yl)(phenyl)methyl)urea (HNPU) on corrosion behavior of carbon steel in 1 M hydrochloric acid solution was investigated using weight loss, potentiostatic polarization, and infrared spectroscopy methods. Surface morphology was studied by scanning electron microscopy (SEM). The experimental results, suggest that HNPU inhibited the corrosion of carbon steel in acid solution and the inhibition efficiencies increased as the concentration of the compound in the solution was increased. The calculated inhibition efficiencies from the two investigated methods were in good agreement. Potentiostatic polarization measurements indicate that HNPU acts as a mixed-type inhibitor. The adsorption of the inhibitor on the carbon steel surface obeys Langmuir adsorption isotherm. The values of activation energy and the thermodynamic parameters, such as adsorption equilibrium constant (Kads), adsorption free energy (ΔGads), adsorption heat (ΔHads), and adsorption entropy (ΔSads) values were calculated and discussed. The results obtained from infrared spectra, confirmed the adsorption of inhibitor on the alloy surface after immersion in acidic solution containing HNPU. The SEM analysis indicated that there are more lightly corroded and oxidative steel surface for the specimens after immersion in acidic solution containing HNPU than that in blank. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905500/abstract [article] Adsorption effect of 1-((2-hydroxynaphtalen-1-yl) (phenyl)methyl)urea on the carbon steel corrosion in hydrochloric acid media [texte imprimé] / S. M. A. Hosseini, Auteur ; M. J. Bahrami, Auteur ; P. Pilvar, Auteur . - 2011 . - pp. 866–871. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 866–871 Mots-clés : Acid  corrosion  inhibitor;  adsorption  isotherm;  infrared  spectroscopy;  SEM;  thermodynamic  parameters Résumé : The adsorption effect of 1-((2-hydroxynaphtalen-1-yl)(phenyl)methyl)urea (HNPU) on corrosion behavior of carbon steel in 1 M hydrochloric acid solution was investigated using weight loss, potentiostatic polarization, and infrared spectroscopy methods. Surface morphology was studied by scanning electron microscopy (SEM). The experimental results, suggest that HNPU inhibited the corrosion of carbon steel in acid solution and the inhibition efficiencies increased as the concentration of the compound in the solution was increased. The calculated inhibition efficiencies from the two investigated methods were in good agreement. Potentiostatic polarization measurements indicate that HNPU acts as a mixed-type inhibitor. The adsorption of the inhibitor on the carbon steel surface obeys Langmuir adsorption isotherm. The values of activation energy and the thermodynamic parameters, such as adsorption equilibrium constant (Kads), adsorption free energy (ΔGads), adsorption heat (ΔHads), and adsorption entropy (ΔSads) values were calculated and discussed. The results obtained from infrared spectra, confirmed the adsorption of inhibitor on the alloy surface after immersion in acidic solution containing HNPU. The SEM analysis indicated that there are more lightly corroded and oxidative steel surface for the specimens after immersion in acidic solution containing HNPU than that in blank. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905500/abstract

Corrosion study of the X52 steel immersed in seawater with a corrosion inhibitor using a rotating cylinder electrode / Garcia-Martinez, R. in Materials and corrosion, Vol. 61 N° 10 (Octobre 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 872–876 Titre : Corrosion study of the X52 steel immersed in seawater with a corrosion inhibitor using a rotating cylinder electrode Type de document : texte imprimé Auteurs : Garcia-Martinez, R., Auteur ; R. Orozco-Cruz, Auteur ; R. Torres-Sanchez, Auteur Année de publication : 2011 Article en page(s) : pp. 872–876 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Corrosion  inhibitor;  impedance;  Rp;  turbulent  flow;  X52  steel Résumé : A corrosion study of API X52 steel was carried out in natural seawater with several concentrations of a corrosion inhibitor (10, 100 and 200 ppm) using a rotating cylinder electrode (RCE) to control the hydrodynamic conditions at environment temperature, atmospheric pressure and 24 h of the exposition time. The rotation speed used was 1000 rpm (turbulent flow). The electrochemical techniques used in the corrosion studies were: linear polarisation resistance (LPR), electrochemical impedance spectroscopy (EIS) and polarisation curves (PCs). The superficial analysis was made using a scanning electron microscope (SEM). The results show a good correlation between electrochemical techniques used. In addition, under turbulent flow, the test solution with 10 ppm had the smallest corrosion rate (CR). It is important to mention that the morphology of the corrosion in all experiments was localised corrosion. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905441/abstract [article] Corrosion study of the X52 steel immersed in seawater with a corrosion inhibitor using a rotating cylinder electrode [texte imprimé] / Garcia-Martinez, R., Auteur ; R. Orozco-Cruz, Auteur ; R. Torres-Sanchez, Auteur . - 2011 . - pp. 872–876. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 872–876 Mots-clés : Corrosion  inhibitor;  impedance;  Rp;  turbulent  flow;  X52  steel Résumé : A corrosion study of API X52 steel was carried out in natural seawater with several concentrations of a corrosion inhibitor (10, 100 and 200 ppm) using a rotating cylinder electrode (RCE) to control the hydrodynamic conditions at environment temperature, atmospheric pressure and 24 h of the exposition time. The rotation speed used was 1000 rpm (turbulent flow). The electrochemical techniques used in the corrosion studies were: linear polarisation resistance (LPR), electrochemical impedance spectroscopy (EIS) and polarisation curves (PCs). The superficial analysis was made using a scanning electron microscope (SEM). The results show a good correlation between electrochemical techniques used. In addition, under turbulent flow, the test solution with 10 ppm had the smallest corrosion rate (CR). It is important to mention that the morphology of the corrosion in all experiments was localised corrosion. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905441/abstract

4-Chloro-benzoic acid [1,2,4]triazol-1-ylmethyl ester as an effective inhibitor of mild steel corrosion in HCl solution / Z. Tao in Materials and corrosion, Vol. 61 N° 10 (Octobre 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 877–884 Titre : 4-Chloro-benzoic acid [1,2,4]triazol-1-ylmethyl ester as an effective inhibitor of mild steel corrosion in HCl solution Type de document : texte imprimé Auteurs : Z. Tao, Auteur ; S. Zhang, Auteur ; W. Li, Auteur Année de publication : 2011 Article en page(s) : pp. 877–884 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Corrosion  inhibition;  corrosion  test;  electrochemical  techniques;  electron  microscopy Résumé : 4-Chloro-benzoic acid [1,2,4]triazol-1-ylmethyl ester (CBT) was synthesized and its inhibiting action on the corrosion of mild steel in 1 M hydrochloric acid solutions was investigated by means of weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscope (SEM). The results showed that CBT is an excellent inhibitor for mild steel in acid medium and its inhibition efficiency (IE%) is up to 90.2% at a concentration of 10−3 M at 298 K. EIS showed that the charge transfer controls the corrosion process in the uninhibited and inhibited solutions. Potentiodynamic polarization studies clearly reveal that CBT acts essentially as mixed-type inhibitor. Thermodynamic parameters such as adsorption heat (), adsorption entropy (), and adsorption free energy En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905291/abstract [article] 4-Chloro-benzoic acid [1,2,4]triazol-1-ylmethyl ester as an effective inhibitor of mild steel corrosion in HCl solution [texte imprimé] / Z. Tao, Auteur ; S. Zhang, Auteur ; W. Li, Auteur . - 2011 . - pp. 877–884. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 877–884 Mots-clés : Corrosion  inhibition;  corrosion  test;  electrochemical  techniques;  electron  microscopy Résumé : 4-Chloro-benzoic acid [1,2,4]triazol-1-ylmethyl ester (CBT) was synthesized and its inhibiting action on the corrosion of mild steel in 1 M hydrochloric acid solutions was investigated by means of weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscope (SEM). The results showed that CBT is an excellent inhibitor for mild steel in acid medium and its inhibition efficiency (IE%) is up to 90.2% at a concentration of 10−3 M at 298 K. EIS showed that the charge transfer controls the corrosion process in the uninhibited and inhibited solutions. Potentiodynamic polarization studies clearly reveal that CBT acts essentially as mixed-type inhibitor. Thermodynamic parameters such as adsorption heat (), adsorption entropy (), and adsorption free energy En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905291/abstract

On the role of deterioration of structures in their performance; with a focus on mining industry equipment and structures / R. Javaherdashti in Materials and corrosion, Vol. 61 N° 10 (Octobre 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 885–890 Titre : On the role of deterioration of structures in their performance; with a focus on mining industry equipment and structures Type de document : texte imprimé Auteurs : R. Javaherdashti, Auteur ; H. Nikraz, Auteur Année de publication : 2011 Article en page(s) : pp. 885–890 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : AMD;  concrete  structures;  corrosion;  mining;  structural  steel Résumé : Some examples of materials performance of civil materials such as steel and concrete in mining industry are considered. These examples are about structural steels (either as support for the structure or the equipment) and concrete structures. Also, it is mentioned that in mine sites that contain sulphide minerals, the formation of acid mine drainage (AMD) may also contribute to decreasing the integrity of civil and supportive structures. Using these examples, an effort has been made to emphasise that in order to extend the service life of structures in very aggressive environments such as those encountered in mining industry, a sound knowledge of deterioration and corrosion-enhancing factors in addition to standardised application of measures against deterioration (such as painting) can be very applicative. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905515/abstract [article] On the role of deterioration of structures in their performance; with a focus on mining industry equipment and structures [texte imprimé] / R. Javaherdashti, Auteur ; H. Nikraz, Auteur . - 2011 . - pp. 885–890. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 10 (Octobre 2010) . - pp. 885–890 Mots-clés : AMD;  concrete  structures;  corrosion;  mining;  structural  steel Résumé : Some examples of materials performance of civil materials such as steel and concrete in mining industry are considered. These examples are about structural steels (either as support for the structure or the equipment) and concrete structures. Also, it is mentioned that in mine sites that contain sulphide minerals, the formation of acid mine drainage (AMD) may also contribute to decreasing the integrity of civil and supportive structures. Using these examples, an effort has been made to emphasise that in order to extend the service life of structures in very aggressive environments such as those encountered in mining industry, a sound knowledge of deterioration and corrosion-enhancing factors in addition to standardised application of measures against deterioration (such as painting) can be very applicative. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905515/abstract

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