Dépouillements

On the applicability of high strength self-tapping aluminium bolts in magnesium nut materials for automotive applications / G. Gerstmayr in Materials and corrosion, Vol. 61 N° 5 (Mai 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 379–387 Titre : On the applicability of high strength self-tapping aluminium bolts in magnesium nut materials for automotive applications Type de document : texte imprimé Auteurs : G. Gerstmayr, Auteur ; G. Mori, Auteur ; H. Leitner, Auteur Année de publication : 2010 Article en page(s) : pp. 379–387 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : galvanic  corrosion;  high  strength  aluminium  alloys;  stress  corrosion  cracking Résumé : High strength aluminium bolts made of AW 6056 T6, AW 7075 T6 and T79 have been investigated regarding the applicability in magnesium nut materials for automotive applications. With respect to galvanic corrosion all combinations of aluminium bolts with magnesium parts show superior corrosion properties when compared to galvanised steel bolts connected to magnesium. With respect to stress corrosion cracking (SCC) no aluminium bolt in contact with magnesium failed due to SCC. This is because of cathodic protection of aluminium alloy through magnesium. Even peak-tempered highest strengthened T6 7xxx aluminium bolts can be used for automotive applications when compressive residual stresses are present in the thread root of the bolts. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905409/abstract [article] On the applicability of high strength self-tapping aluminium bolts in magnesium nut materials for automotive applications [texte imprimé] / G. Gerstmayr, Auteur ; G. Mori, Auteur ; H. Leitner, Auteur . - 2010 . - pp. 379–387. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 379–387 Mots-clés : galvanic  corrosion;  high  strength  aluminium  alloys;  stress  corrosion  cracking Résumé : High strength aluminium bolts made of AW 6056 T6, AW 7075 T6 and T79 have been investigated regarding the applicability in magnesium nut materials for automotive applications. With respect to galvanic corrosion all combinations of aluminium bolts with magnesium parts show superior corrosion properties when compared to galvanised steel bolts connected to magnesium. With respect to stress corrosion cracking (SCC) no aluminium bolt in contact with magnesium failed due to SCC. This is because of cathodic protection of aluminium alloy through magnesium. Even peak-tempered highest strengthened T6 7xxx aluminium bolts can be used for automotive applications when compressive residual stresses are present in the thread root of the bolts. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905409/abstract

Corrosion behavior of Mg-10Gd-2Y-0.4Zr alloy under thin electrolyte layers / C. Chen in Materials and corrosion, Vol. 61 N° 5 (Mai 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 388–397 Titre : Corrosion behavior of Mg-10Gd-2Y-0.4Zr alloy under thin electrolyte layers Type de document : texte imprimé Auteurs : C. Chen, Auteur ; T. Zhang, Auteur ; G. Meng, Auteur Année de publication : 2010 Article en page(s) : pp. 388–397 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : corrosion;  electrochemical  noise;  magnesium  alloy;  stochastic  analysis;  thin  electrolyte  layer Résumé : The corrosion behavior of Mg-10Gd-2Y-0.4Zr (GW102K) alloy under thin electrolyte layer (TEL) with various thicknesses was investigated by means of cathodic polarization curve, electrochemical impedance spectroscopy (EIS), and electrochemical noise (EN). Based on shot noise theory and stochastic theory, the EN results were quantitatively analyzed by using the Weibull and Gumbel distribution function, respectively. The experimental results showed that the anodic and cathodic processes of the corrosion of GW102K alloy were both retained under thin electrolyte layers. Whether under TEL or not, the cathodic process was dominated by hydrogen evolution reaction. The corrosion was more localized under thin electrolyte layer than that in bulk solution. The results also demonstrated that there were two kinds of effects for thin electrolyte layer on the corrosion behavior of GW102K alloy: (i) the rate of pit initiation was evidently retarded compared to that in bulk solution; (ii) the probability of pit growth decreased, which should be the real reason why the corrosion rate of GW102K alloy decreased with the decrease in layer thickness. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905330/abstract [article] Corrosion behavior of Mg-10Gd-2Y-0.4Zr alloy under thin electrolyte layers [texte imprimé] / C. Chen, Auteur ; T. Zhang, Auteur ; G. Meng, Auteur . - 2010 . - pp. 388–397. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 388–397 Mots-clés : corrosion;  electrochemical  noise;  magnesium  alloy;  stochastic  analysis;  thin  electrolyte  layer Résumé : The corrosion behavior of Mg-10Gd-2Y-0.4Zr (GW102K) alloy under thin electrolyte layer (TEL) with various thicknesses was investigated by means of cathodic polarization curve, electrochemical impedance spectroscopy (EIS), and electrochemical noise (EN). Based on shot noise theory and stochastic theory, the EN results were quantitatively analyzed by using the Weibull and Gumbel distribution function, respectively. The experimental results showed that the anodic and cathodic processes of the corrosion of GW102K alloy were both retained under thin electrolyte layers. Whether under TEL or not, the cathodic process was dominated by hydrogen evolution reaction. The corrosion was more localized under thin electrolyte layer than that in bulk solution. The results also demonstrated that there were two kinds of effects for thin electrolyte layer on the corrosion behavior of GW102K alloy: (i) the rate of pit initiation was evidently retarded compared to that in bulk solution; (ii) the probability of pit growth decreased, which should be the real reason why the corrosion rate of GW102K alloy decreased with the decrease in layer thickness. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905330/abstract

Strength of spot-welded steel sheets in corrosive environment / G. Mukhopadhyay in Materials and corrosion, Vol. 61 N° 5 (Mai 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 398–406 Titre : Strength of spot-welded steel sheets in corrosive environment Type de document : texte imprimé Auteurs : G. Mukhopadhyay, Auteur ; Bhattacharya, S., Auteur ; K. K. Ray, Auteur Année de publication : 2010 Article en page(s) : pp. 398–406 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : corrosion;  hydrogen  damage;  interstitial  free  steel;  slow  strain  rate  test;  spot-weld Résumé : The load bearing capacity (LBC), often referred to as strength, of spot-welded joints on as-received and pre-strained sheets of an interstitial free (IF) steel has been examined under 3.5% sodium chloride solution using tensile-shear (TS) specimens. These tests have been carried out under three different test conditions: (i) after immersing the samples in the solution for various duration of time, (ii) at various slow strain rates by keeping the samples in solution, and (iii) at slow strain rate under in situ hydrogen charging. Analyses of the results infer that (i) increased duration of immersion of the samples in aggressive environment decreases their LBC but increases their extension corresponding to the maximum load (EML), (ii) slow strain rate tests in the solution indicate marginal decrease of LBC and EML of the spot-welds, (iii) the LBC and EML of the spot-welds of pre-strained sheets decrease considerably with cathodic hydrogen charging while EML of the spot-welded joints on the as-received sheets is found to improve, and finally, (iv) the detrimental effect of corrosive environment increases with increased pre-strain of the investigated sheets. These observations have been discussed together with post-failure examinations of the broken fractured surfaces, which have assisted in understanding their failure mechanism. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905427/abstract [article] Strength of spot-welded steel sheets in corrosive environment [texte imprimé] / G. Mukhopadhyay, Auteur ; Bhattacharya, S., Auteur ; K. K. Ray, Auteur . - 2010 . - pp. 398–406. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 398–406 Mots-clés : corrosion;  hydrogen  damage;  interstitial  free  steel;  slow  strain  rate  test;  spot-weld Résumé : The load bearing capacity (LBC), often referred to as strength, of spot-welded joints on as-received and pre-strained sheets of an interstitial free (IF) steel has been examined under 3.5% sodium chloride solution using tensile-shear (TS) specimens. These tests have been carried out under three different test conditions: (i) after immersing the samples in the solution for various duration of time, (ii) at various slow strain rates by keeping the samples in solution, and (iii) at slow strain rate under in situ hydrogen charging. Analyses of the results infer that (i) increased duration of immersion of the samples in aggressive environment decreases their LBC but increases their extension corresponding to the maximum load (EML), (ii) slow strain rate tests in the solution indicate marginal decrease of LBC and EML of the spot-welds, (iii) the LBC and EML of the spot-welds of pre-strained sheets decrease considerably with cathodic hydrogen charging while EML of the spot-welded joints on the as-received sheets is found to improve, and finally, (iv) the detrimental effect of corrosive environment increases with increased pre-strain of the investigated sheets. These observations have been discussed together with post-failure examinations of the broken fractured surfaces, which have assisted in understanding their failure mechanism. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905427/abstract

Electrochemical corrosion behaviour of a Ti-IF steel and a SAE 1020 steel in a 0.5 M NaCl solution / W. R. Osório in Materials and corrosion, Vol. 61 N° 5 (Mai 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 407–411 Titre : Electrochemical corrosion behaviour of a Ti-IF steel and a SAE 1020 steel in a 0.5 M NaCl solution Type de document : texte imprimé Auteurs : W. R. Osório, Auteur ; L. C. Peixoto, Auteur ; A. Garcia, Auteur Année de publication : 2010 Article en page(s) : pp. 407–411 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : corrosion;  electrochemical  impedance;  low  carbon  steel;  microstructure Résumé : Investigations concerning the electrochemical corrosion behaviour of low carbon (LC) and ultra-low carbon (ULC) steels are relatively scarce and limited. The present study aims to compare electrochemical impedance parameters and potentiodynamic polarization curves of an LC steel and an ULC Ti-interstitial free (IF) steel evidencing the effects of carbon content and pearlite fraction on the electrochemical corrosion behaviour. Corrosion tests were carried out in a 0.5 M NaCl solution at 25 °C with a pH range between 6.5 and 6.8. It was found that the IF steel sample presents an electrochemical corrosion resistance, which is slightly higher than that of the LC steel sample. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905420/abstract [article] Electrochemical corrosion behaviour of a Ti-IF steel and a SAE 1020 steel in a 0.5 M NaCl solution [texte imprimé] / W. R. Osório, Auteur ; L. C. Peixoto, Auteur ; A. Garcia, Auteur . - 2010 . - pp. 407–411. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 407–411 Mots-clés : corrosion;  electrochemical  impedance;  low  carbon  steel;  microstructure Résumé : Investigations concerning the electrochemical corrosion behaviour of low carbon (LC) and ultra-low carbon (ULC) steels are relatively scarce and limited. The present study aims to compare electrochemical impedance parameters and potentiodynamic polarization curves of an LC steel and an ULC Ti-interstitial free (IF) steel evidencing the effects of carbon content and pearlite fraction on the electrochemical corrosion behaviour. Corrosion tests were carried out in a 0.5 M NaCl solution at 25 °C with a pH range between 6.5 and 6.8. It was found that the IF steel sample presents an electrochemical corrosion resistance, which is slightly higher than that of the LC steel sample. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905420/abstract

Corrosion performance of Zn–Al–Mg coatings in open and confined zones in conditions simulating automotive applications / T. Prosek in Materials and corrosion, Vol. 61 N° 5 (Mai 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 412–420 Titre : Corrosion performance of Zn–Al–Mg coatings in open and confined zones in conditions simulating automotive applications Type de document : texte imprimé Auteurs : T. Prosek, Auteur ; N. Larché, Auteur ; M. Vlot, Auteur Année de publication : 2010 Article en page(s) : pp. 412–420 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : accelerated  testing;  alloy  coating;  automotive;  confined  zone;  perforation  corrosion Résumé : Panels coated by hot dipping with zinc (HDG), Zn–5Al (Galfan) and Zn–1.5Al–1.5Mg coatings at different thicknesses were phosphated and painted on an industrial line. Crevice panels with non-painted bare parts modelling conditions in hem flanges, reference panels with open surfaces and formed non-painted panels were exposed to a cyclic accelerated automotive test. Zn–Al–Mg coatings with the thickness of 10 µm provided similar or even better protection than HDG and Galfan at 20 µm in both confined and open configurations. In comparison to 10-µm HDG, the Zn–Al–Mg coating delayed red rust appearance in crevices by a factor of 2 and the maximal depth of corrosion in the steel substrate was by 42% lower. Confined areas were more corroded than open surfaces. For HDG, the time to red rust appearance dropped by 50–75%, corrosion attack in steel was from 3.5 to 7 times deeper and mass gain was about 2.3 times higher in crevices than on open surfaces. Corrosion of Zn–Al–Mg may be more affected by local environmental conditions created by the crevice configuration than for HDG. Red rust appearance on formed panels of 20-µm Galfan, 7-, 10- and 14-µm Zn–Al–Mg was delayed to 10-µm HDG by a factor of 2.8, 3.5, 3.8 and >4.5, respectively. No adverse effect of forming was noticed. The results indicate that 2- to 3-fold reduction of the coating thickness for Zn–Al–Mg alloy coatings in comparison to traditional HDG may be possible without compromising the corrosion performance. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905425/abstract [article] Corrosion performance of Zn–Al–Mg coatings in open and confined zones in conditions simulating automotive applications [texte imprimé] / T. Prosek, Auteur ; N. Larché, Auteur ; M. Vlot, Auteur . - 2010 . - pp. 412–420. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 412–420 Mots-clés : accelerated  testing;  alloy  coating;  automotive;  confined  zone;  perforation  corrosion Résumé : Panels coated by hot dipping with zinc (HDG), Zn–5Al (Galfan) and Zn–1.5Al–1.5Mg coatings at different thicknesses were phosphated and painted on an industrial line. Crevice panels with non-painted bare parts modelling conditions in hem flanges, reference panels with open surfaces and formed non-painted panels were exposed to a cyclic accelerated automotive test. Zn–Al–Mg coatings with the thickness of 10 µm provided similar or even better protection than HDG and Galfan at 20 µm in both confined and open configurations. In comparison to 10-µm HDG, the Zn–Al–Mg coating delayed red rust appearance in crevices by a factor of 2 and the maximal depth of corrosion in the steel substrate was by 42% lower. Confined areas were more corroded than open surfaces. For HDG, the time to red rust appearance dropped by 50–75%, corrosion attack in steel was from 3.5 to 7 times deeper and mass gain was about 2.3 times higher in crevices than on open surfaces. Corrosion of Zn–Al–Mg may be more affected by local environmental conditions created by the crevice configuration than for HDG. Red rust appearance on formed panels of 20-µm Galfan, 7-, 10- and 14-µm Zn–Al–Mg was delayed to 10-µm HDG by a factor of 2.8, 3.5, 3.8 and >4.5, respectively. No adverse effect of forming was noticed. The results indicate that 2- to 3-fold reduction of the coating thickness for Zn–Al–Mg alloy coatings in comparison to traditional HDG may be possible without compromising the corrosion performance. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905425/abstract

Effect of the metallic substrate and zinc layer on the atmospheric corrosion resistance of phosphatized and painted electrogalvanized steels / E. A. Alvarenga in Materials and corrosion, Vol. 61 N° 5 (Mai 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 421–427 Titre : Effect of the metallic substrate and zinc layer on the atmospheric corrosion resistance of phosphatized and painted electrogalvanized steels Type de document : texte imprimé Auteurs : E. A. Alvarenga, Auteur ; J. G. Moreira, Auteur ; V. T. L. Buono, Auteur Année de publication : 2010 Article en page(s) : pp. 421–427 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : atmospheric  corrosion;  electrogalvanizing;  forming;  nickel–copper–chromium  carbon  steel;  painting Résumé : In this work, the influence of the metallic substrate and zinc layer on the atmospheric corrosion resistance of phosphatized and painted electrogalvanized steels was evaluated. For this purpose two types of electrogalvanized steels were used, one with drawing quality carbon steel as metallic substrate, and the other one with a substrate of Ni–Cu–Cr added carbon steel. The corrosion resistance was determined by accelerated and non-accelerated corrosion tests, using cyclic test chambers and field tests in industrial and marine atmosphere. The mean corrosion advance and the maximum corrosion penetration of samples were measured using image analysis techniques. The study showed that the substrate and zinc layer mass play a decisive role on the atmospheric corrosion resistance of the phosphatized and painted electrogalvanized steels. It was also verified that it is possible to use smaller zinc layer masses without compromising the corrosion resistance of the material, provided that the metallic substrate has characteristics of atmospheric corrosion resistance, thus contributing to the improvement of the zinc coated steels. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905360/abstract [article] Effect of the metallic substrate and zinc layer on the atmospheric corrosion resistance of phosphatized and painted electrogalvanized steels [texte imprimé] / E. A. Alvarenga, Auteur ; J. G. Moreira, Auteur ; V. T. L. Buono, Auteur . - 2010 . - pp. 421–427. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 421–427 Mots-clés : atmospheric  corrosion;  electrogalvanizing;  forming;  nickel–copper–chromium  carbon  steel;  painting Résumé : In this work, the influence of the metallic substrate and zinc layer on the atmospheric corrosion resistance of phosphatized and painted electrogalvanized steels was evaluated. For this purpose two types of electrogalvanized steels were used, one with drawing quality carbon steel as metallic substrate, and the other one with a substrate of Ni–Cu–Cr added carbon steel. The corrosion resistance was determined by accelerated and non-accelerated corrosion tests, using cyclic test chambers and field tests in industrial and marine atmosphere. The mean corrosion advance and the maximum corrosion penetration of samples were measured using image analysis techniques. The study showed that the substrate and zinc layer mass play a decisive role on the atmospheric corrosion resistance of the phosphatized and painted electrogalvanized steels. It was also verified that it is possible to use smaller zinc layer masses without compromising the corrosion resistance of the material, provided that the metallic substrate has characteristics of atmospheric corrosion resistance, thus contributing to the improvement of the zinc coated steels. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905360/abstract

Electrochemical methods study on corrosion of 5% Al–Zn alloy-coated steel under thin electrolyte layers / S. Xing in Materials and corrosion, Vol. 61 N° 5 (Mai 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 428–431 Titre : Electrochemical methods study on corrosion of 5% Al–Zn alloy-coated steel under thin electrolyte layers Type de document : texte imprimé Auteurs : S. Xing, Auteur ; Y. Li, Auteur ; J. Wu, Auteur Année de publication : 2010 Article en page(s) : pp. 428–431 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : 5%  Al–Zn;  corrosion  monitoring;  electrochemical  impedance  spectroscopy;  wet–dry  condition Résumé : The corrosion behavior of a 5% Al–Zn alloy (GF) coated steel was investigated under cyclic wet–dry condition using electrochemical techniques. The wet–dry cycle was conducted by exposure to alternate condition of 1 h immersion in seawater and 7 h drying at ambient temperature. The polarization resistance, Rp of the coating was monitored during the wet–dry cycles by two points AC impedance method and the corrosion potential, Ecorr was measured only when the coating was immersed in seawater. Simultaneously, the electrochemical impedance spectroscopy (EIS) of the coating was obtained after it was immersed in different cycles of wet–dry condition. The results obtained by two points AC impedance method had good agreement with those achieved from EIS technique, which proved that the two points AC impedance method was correct and an effective method for atmospheric corrosion study. The monitoring results indicated that the corrosion rate of GF coating firstly increased, then decreased slowly with time, and at last reached a relative steady state with local corrosion under the cyclic wet–dry alternate condition. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905313/abstract [article] Electrochemical methods study on corrosion of 5% Al–Zn alloy-coated steel under thin electrolyte layers [texte imprimé] / S. Xing, Auteur ; Y. Li, Auteur ; J. Wu, Auteur . - 2010 . - pp. 428–431. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 428–431 Mots-clés : 5%  Al–Zn;  corrosion  monitoring;  electrochemical  impedance  spectroscopy;  wet–dry  condition Résumé : The corrosion behavior of a 5% Al–Zn alloy (GF) coated steel was investigated under cyclic wet–dry condition using electrochemical techniques. The wet–dry cycle was conducted by exposure to alternate condition of 1 h immersion in seawater and 7 h drying at ambient temperature. The polarization resistance, Rp of the coating was monitored during the wet–dry cycles by two points AC impedance method and the corrosion potential, Ecorr was measured only when the coating was immersed in seawater. Simultaneously, the electrochemical impedance spectroscopy (EIS) of the coating was obtained after it was immersed in different cycles of wet–dry condition. The results obtained by two points AC impedance method had good agreement with those achieved from EIS technique, which proved that the two points AC impedance method was correct and an effective method for atmospheric corrosion study. The monitoring results indicated that the corrosion rate of GF coating firstly increased, then decreased slowly with time, and at last reached a relative steady state with local corrosion under the cyclic wet–dry alternate condition. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905313/abstract

Effect of ethanol as gasoline additive on vehicle fuel delivery system corrosion / H. Jafari in Materials and corrosion, Vol. 61 N° 5 (Mai 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 432–440 Titre : Effect of ethanol as gasoline additive on vehicle fuel delivery system corrosion Type de document : texte imprimé Auteurs : H. Jafari, Auteur ; M. H. Idris, Auteur ; A. Ourdjini, Auteur Année de publication : 2010 Article en page(s) : pp. 432–440 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : corrosion;  electrochemical  impedance  stereoscopy;  ethanol;  fuel  delivery  system;  gasoline;  immersion  test Résumé : In this research, the effect of ethanol as gasoline additive has been investigated into metal corrosion of a fuel delivery system. Corrosion tests have been performed in gasoline with different percentages of ethanol, using weight loss (immersion test) and electrochemical impedance stereoscopy (EIS) procedures. Surface of test specimens were checked by scanning electron microscopy (SEM) after 144 days of immersion in test solution. Also corroded components were analyzed using energy-dispersive X-ray analysis (EDAX) method. Test results, investigations, and analyses, altogether show more corrosion with the increase in ethanol percentage and water content in gasoline. Test results show that among different materials in fuel delivery system, aluminum alloys and hard soldering alloys have less corrosion than the others. Also chloride and sulfide were recognized as the main compound of corrosion products; therefore, the control of these two elements in fuel delivery system is a must in case of using ethanol as fuel additive in near future. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905459/abstract [article] Effect of ethanol as gasoline additive on vehicle fuel delivery system corrosion [texte imprimé] / H. Jafari, Auteur ; M. H. Idris, Auteur ; A. Ourdjini, Auteur . - 2010 . - pp. 432–440. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 5 (Mai 2010) . - pp. 432–440 Mots-clés : corrosion;  electrochemical  impedance  stereoscopy;  ethanol;  fuel  delivery  system;  gasoline;  immersion  test Résumé : In this research, the effect of ethanol as gasoline additive has been investigated into metal corrosion of a fuel delivery system. Corrosion tests have been performed in gasoline with different percentages of ethanol, using weight loss (immersion test) and electrochemical impedance stereoscopy (EIS) procedures. Surface of test specimens were checked by scanning electron microscopy (SEM) after 144 days of immersion in test solution. Also corroded components were analyzed using energy-dispersive X-ray analysis (EDAX) method. Test results, investigations, and analyses, altogether show more corrosion with the increase in ethanol percentage and water content in gasoline. Test results show that among different materials in fuel delivery system, aluminum alloys and hard soldering alloys have less corrosion than the others. Also chloride and sulfide were recognized as the main compound of corrosion products; therefore, the control of these two elements in fuel delivery system is a must in case of using ethanol as fuel additive in near future. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905459/abstract

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