Dépouillements

Corrosion resistance of stainless steel pipes in soil / L. Sjögren in Materials and corrosion, Vol. 62 N° 4 (Avril 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 299-309 Titre : Corrosion resistance of stainless steel pipes in soil Type de document : texte imprimé Auteurs : L. Sjögren, Auteur ; G. Camitz, Auteur ; J. Peultier, Auteur Année de publication : 2011 Article en page(s) : pp. 299-309 Note générale : Génie Mécannique Langues : Anglais (eng) Mots-clés : AC-induced  corrosion  Pipes  Soil  corrosion  Stainless  steel Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : To be able to give safe recommendations concerning the choice of suitable stainless steel grades for pipelines to be buried in various soil environments, a large research programme, including field exposures of test specimens buried in soil in Sweden and in France, has been performed. Resistance against external corrosion of austenitic, super austenitic, lean duplex, duplex and super duplex steel grades in soil has been investigated by laboratory tests and field exposures. The grades included have been screened according to their critical pitting-corrosion temperature and according to their time-to-re-passivation after the passive layer has been destroyed locally by scratching. The field exposures programme, being the core of the investigation, uses large specimens: 2 m pipes and plates, of different grades. The exposure has been performed to reveal effects of aeration cells, deposits or confined areas, welds and burial depth. Additionally, investigations of the tendency of stainless steel to corrode under the influence of alternating current (AC) have been performed, both in the laboratory and in the field. Recommendations for use of stainless steels under different soil conditions are given based on experimental results and on operating experiences of existing stainless steel pipelines in soil. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905552/abstract [article] Corrosion resistance of stainless steel pipes in soil [texte imprimé] / L. Sjögren, Auteur ; G. Camitz, Auteur ; J. Peultier, Auteur . - 2011 . - pp. 299-309. Génie Mécannique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 299-309 Mots-clés : AC-induced  corrosion  Pipes  Soil  corrosion  Stainless  steel Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : To be able to give safe recommendations concerning the choice of suitable stainless steel grades for pipelines to be buried in various soil environments, a large research programme, including field exposures of test specimens buried in soil in Sweden and in France, has been performed. Resistance against external corrosion of austenitic, super austenitic, lean duplex, duplex and super duplex steel grades in soil has been investigated by laboratory tests and field exposures. The grades included have been screened according to their critical pitting-corrosion temperature and according to their time-to-re-passivation after the passive layer has been destroyed locally by scratching. The field exposures programme, being the core of the investigation, uses large specimens: 2 m pipes and plates, of different grades. The exposure has been performed to reveal effects of aeration cells, deposits or confined areas, welds and burial depth. Additionally, investigations of the tendency of stainless steel to corrode under the influence of alternating current (AC) have been performed, both in the laboratory and in the field. Recommendations for use of stainless steels under different soil conditions are given based on experimental results and on operating experiences of existing stainless steel pipelines in soil. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905552/abstract

Improvement in corrosion resistance of commercial pure titanium for the enhancement of its biocompatibility / Q. Mohsen in Materials and corrosion, Vol. 62 N° 4 (Avril 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 310–319 Titre : Improvement in corrosion resistance of commercial pure titanium for the enhancement of its biocompatibility Type de document : texte imprimé Auteurs : Q. Mohsen, Auteur ; S. A. Fadl-Allah, Auteur Année de publication : 2011 Article en page(s) : pp. 310–319 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : nodic  oxide  films  EDX  Impedance  (EIS)  Nickel  sulfate  SealingSEM  Titanium Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : A new surface modification protocol encompassing an anodization treatment has been developed to improve the surface properties of biomedical titanium. Anodization in presence of nickel sulfate is one of a good way to improve the resistance of commercial pure titanium (cp-Ti) in phosphate saline buffer solution (PSB). The potentiostatic behavior of anodized titanium in sulfuric acid with nickel sulfate differed markedly from that of titanium anodized in sulfuric acid free from nickel sulfate. Polarization and electrochemical impedance spectroscopy (EIS) recorded an increase in the corrosion resistance of the passive film. Scanning electron microscopy (SEM) and energy diffraction X-ray (EDX) analysis were used to investigate the morphology and structure of the anodized film in absence and in presence of nickel sulfate. On the other hand, sealed anodized titanium samples exposed to PSB for up to 3 days have been studied by EIS to obtain detailed information concerning the electrochemical properties of sealed anodized titanium. An equivalent circuit that reproduces the impedance results of porous cp-Ti oxide (TiO2) films is proposed. These observations indicate that anodization of cp-Ti in presence of nickel sulfate and sealing the anodized film can serve as a simple low-temperature method to enhance the corrosion resistance of cp-Ti when used as an implant material. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905534/abstract [article] Improvement in corrosion resistance of commercial pure titanium for the enhancement of its biocompatibility [texte imprimé] / Q. Mohsen, Auteur ; S. A. Fadl-Allah, Auteur . - 2011 . - pp. 310–319. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 310–319 Mots-clés : nodic  oxide  films  EDX  Impedance  (EIS)  Nickel  sulfate  SealingSEM  Titanium Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : A new surface modification protocol encompassing an anodization treatment has been developed to improve the surface properties of biomedical titanium. Anodization in presence of nickel sulfate is one of a good way to improve the resistance of commercial pure titanium (cp-Ti) in phosphate saline buffer solution (PSB). The potentiostatic behavior of anodized titanium in sulfuric acid with nickel sulfate differed markedly from that of titanium anodized in sulfuric acid free from nickel sulfate. Polarization and electrochemical impedance spectroscopy (EIS) recorded an increase in the corrosion resistance of the passive film. Scanning electron microscopy (SEM) and energy diffraction X-ray (EDX) analysis were used to investigate the morphology and structure of the anodized film in absence and in presence of nickel sulfate. On the other hand, sealed anodized titanium samples exposed to PSB for up to 3 days have been studied by EIS to obtain detailed information concerning the electrochemical properties of sealed anodized titanium. An equivalent circuit that reproduces the impedance results of porous cp-Ti oxide (TiO2) films is proposed. These observations indicate that anodization of cp-Ti in presence of nickel sulfate and sealing the anodized film can serve as a simple low-temperature method to enhance the corrosion resistance of cp-Ti when used as an implant material. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905534/abstract

Corrosion behavior of hydrophobic titanium oxide film pre-treated in hydrogen peroxide solution / M. Wang in Materials and corrosion, Vol. 62 N° 4 (Avril 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 320–325 Titre : Corrosion behavior of hydrophobic titanium oxide film pre-treated in hydrogen peroxide solution Type de document : texte imprimé Auteurs : M. Wang, Auteur ; Wang, W., Auteur ; B. L. He, Auteur Année de publication : 2011 Article en page(s) : pp. 320–325 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Corrosion  resistance  EIS  Hydrophobic  Surface  morphology  Titanium  oxide Résumé : Hydrophobic titanium oxide (TiO2) film formed on metallic titanium substrate in hydrogen peroxide solution with a subsequent oxidation under air atmosphere. Component, microstructure, and hydrophobicity of the oxide film were characterized by X-ray diffraction, scanning electron microscope, and water contact angle methods. Corrosion resistance tests were carried out in seawater solution at different heating temperature conditions. Electrochemical impedance spectroscopy techniques and polarization curves were used to study the changes and the corrosion resistance of the TiO2 film. The results demonstrate that the pre-treated TiO2 film heated at 400 °C environment owns small special groove-shaped structure on its surface, which induce higher hydrophobic capability, larger impedance, and better electrochemical stability than the film that was prepared at other temperatures or the Ti with nature formed oxidation film. It would be an ideal candidate as engineering material in deep seawater environment. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905451/abstract [article] Corrosion behavior of hydrophobic titanium oxide film pre-treated in hydrogen peroxide solution [texte imprimé] / M. Wang, Auteur ; Wang, W., Auteur ; B. L. He, Auteur . - 2011 . - pp. 320–325. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 320–325 Mots-clés : Corrosion  resistance  EIS  Hydrophobic  Surface  morphology  Titanium  oxide Résumé : Hydrophobic titanium oxide (TiO2) film formed on metallic titanium substrate in hydrogen peroxide solution with a subsequent oxidation under air atmosphere. Component, microstructure, and hydrophobicity of the oxide film were characterized by X-ray diffraction, scanning electron microscope, and water contact angle methods. Corrosion resistance tests were carried out in seawater solution at different heating temperature conditions. Electrochemical impedance spectroscopy techniques and polarization curves were used to study the changes and the corrosion resistance of the TiO2 film. The results demonstrate that the pre-treated TiO2 film heated at 400 °C environment owns small special groove-shaped structure on its surface, which induce higher hydrophobic capability, larger impedance, and better electrochemical stability than the film that was prepared at other temperatures or the Ti with nature formed oxidation film. It would be an ideal candidate as engineering material in deep seawater environment. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905451/abstract

Effect of nano Al (Scx−1Zrx) precipitates on the mechanical and corrosion behavior of Al-2.5 Mg alloys / Z. Ahmad in Materials and corrosion, Vol. 62 N° 4 (Avril 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 335–345 Titre : Effect of nano Al (Scx−1Zrx) precipitates on the mechanical and corrosion behavior of Al-2.5 Mg alloys Type de document : texte imprimé Auteurs : Z. Ahmad, Auteur ; B. J. Abdul Aleem, Auteur Année de publication : 2011 Article en page(s) : pp. 335–345 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Al-Mg  alloys  Electrochemical  corrosion  Strengthening  Nano-precipitates  Scandium  Grain  boundary  precipitates Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Microanalytical, mechanical, and corrosion studies were undertaken to investigate the effect of nano-precipitates of Al(Scx−1Zrx) on the mechanical and corrosion characteristics of Al 2.5 alloy containing 0, 0.15, 0.3, 0.6, and 0.9 wt% of Sc with 0.15 wt% Zr. Addition of 0.3% Sc significantly increased the yield strength due to small precipitates sizes (5–19 nm) and the high coherency of the nano-particles. Largest contributor to the strength was grain boundary strengthening caused by pinning of grain boundary precipitates. The alloys showed a good resistance to corrosion in 3.5 wt% neutral chloride solution. The alloy offered a high passivation tendency because of homogeneous coherent nano Al(Scx−1Zrx) precipitates. The nano precipitates interfaces and homogeneously distributed Al3Sc precipitates offer a high degree of corrosion resistance to Al 2.5 Mg Sc alloys compared to conventional aluminum alloys, such as Al 6061 and Al6013. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905342/abstract [article] Effect of nano Al (Scx−1Zrx) precipitates on the mechanical and corrosion behavior of Al-2.5 Mg alloys [texte imprimé] / Z. Ahmad, Auteur ; B. J. Abdul Aleem, Auteur . - 2011 . - pp. 335–345. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 335–345 Mots-clés : Al-Mg  alloys  Electrochemical  corrosion  Strengthening  Nano-precipitates  Scandium  Grain  boundary  precipitates Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Microanalytical, mechanical, and corrosion studies were undertaken to investigate the effect of nano-precipitates of Al(Scx−1Zrx) on the mechanical and corrosion characteristics of Al 2.5 alloy containing 0, 0.15, 0.3, 0.6, and 0.9 wt% of Sc with 0.15 wt% Zr. Addition of 0.3% Sc significantly increased the yield strength due to small precipitates sizes (5–19 nm) and the high coherency of the nano-particles. Largest contributor to the strength was grain boundary strengthening caused by pinning of grain boundary precipitates. The alloys showed a good resistance to corrosion in 3.5 wt% neutral chloride solution. The alloy offered a high passivation tendency because of homogeneous coherent nano Al(Scx−1Zrx) precipitates. The nano precipitates interfaces and homogeneously distributed Al3Sc precipitates offer a high degree of corrosion resistance to Al 2.5 Mg Sc alloys compared to conventional aluminum alloys, such as Al 6061 and Al6013. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905342/abstract

Study on the corrosion behavior of NdFeB permanent magnets in nitric acid and oxalic acid solutions with electrochemical techniques / H. Zhang in Materials and corrosion, Vol. 62 N° 4 (Avril 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 346–351 Titre : Study on the corrosion behavior of NdFeB permanent magnets in nitric acid and oxalic acid solutions with electrochemical techniques Type de document : texte imprimé Auteurs : H. Zhang, Auteur ; Z. L. Song, Auteur ; S. D. Mao, Auteur Année de publication : 2011 Article en page(s) : pp. 346–351 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Corrosion  behavior  Corrosion  mechanisms  Electrochemical  measurements  Electrochemical  noise  NdFeB  magnets Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Corrosion behavior of sintered NdFeB magnets in nitric acid and oxalic acid was investigated. The experiment results indicated that NdFeB is strongly corroded in nitric acid solution, and is passivated in oxalic acid solution. Based on the corrosion behavior, the possible corrosion mechanisms are discussed. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905498/abstract [article] Study on the corrosion behavior of NdFeB permanent magnets in nitric acid and oxalic acid solutions with electrochemical techniques [texte imprimé] / H. Zhang, Auteur ; Z. L. Song, Auteur ; S. D. Mao, Auteur . - 2011 . - pp. 346–351. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 346–351 Mots-clés : Corrosion  behavior  Corrosion  mechanisms  Electrochemical  measurements  Electrochemical  noise  NdFeB  magnets Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Corrosion behavior of sintered NdFeB magnets in nitric acid and oxalic acid was investigated. The experiment results indicated that NdFeB is strongly corroded in nitric acid solution, and is passivated in oxalic acid solution. Based on the corrosion behavior, the possible corrosion mechanisms are discussed. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905498/abstract

Simulation for fretting corrosion of tin-coated copper contacts / K. Y. Lee in Materials and corrosion, Vol. 62 N° 4 (Avril 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 352–356 Titre : Simulation for fretting corrosion of tin-coated copper contacts Type de document : texte imprimé Auteurs : K. Y. Lee, Auteur ; D. K. Jeong, Auteur ; H. G. Joo, Auteur Année de publication : 2011 Article en page(s) : pp. 352–356 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Contact  resistance  Fretting  corrosion  Simulation  Surface  characterization Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The simulations of contact resistance variation under various oxide fractions are conducted. The copper oxide is assigned on the contact area with various fractions by the random distribution technique. The calculated contact resistance at each oxide area fraction is compared with the experimental result. The increase in contact resistance results in an increased oxide area fraction. DEWEY : 620.1 ISSN : 0847-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905533/abstract [article] Simulation for fretting corrosion of tin-coated copper contacts [texte imprimé] / K. Y. Lee, Auteur ; D. K. Jeong, Auteur ; H. G. Joo, Auteur . - 2011 . - pp. 352–356. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 352–356 Mots-clés : Contact  resistance  Fretting  corrosion  Simulation  Surface  characterization Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The simulations of contact resistance variation under various oxide fractions are conducted. The copper oxide is assigned on the contact area with various fractions by the random distribution technique. The calculated contact resistance at each oxide area fraction is compared with the experimental result. The increase in contact resistance results in an increased oxide area fraction. DEWEY : 620.1 ISSN : 0847-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905533/abstract

Effect of different thermochemical treatments on the electrochemical behaviour of a hot working steel / F. Rosalbino in Materials and corrosion, Vol. 62 N° 4 (Avril 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 357–361 Titre : Effect of different thermochemical treatments on the electrochemical behaviour of a hot working steel Type de document : texte imprimé Auteurs : F. Rosalbino, Auteur ; G. Scavino, Auteur ; E. Angelini, Auteur Année de publication : 2011 Article en page(s) : pp. 357–361 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Hot  working  steel  Nitriding  Nitrocarburising  Overcarburising  Polarisation  curves Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The X 37CrMoV5 1 KU hot working steel has been quenched and tempered, overcarburised, nitrided and nitrocarburised. The surface layers constituted after the thermochemical treatments were characterised by means of X-ray diffraction (XRD) analyses, optical and scanning electron microscope (SEM) observations, micro- and macrohardness indentations. The electrochemical behaviour was evaluated in two different aggressive environments: 0.1 M Na2SO4 and 0.1 M NaCl solutions. While the overcarburised and the nitrocarburised samples exhibit a poor electrochemical behaviour, the presence of a nitrided surface layer enhances the corrosion resistance. This is attributable to the protective action of the nitrided layer that hinders the anodic dissolution reaction of the matrix, whereas the presence of complex carbides in the overcarburised or nitrocarburised samples causes the preferential dissolution of the ferritic matrix due to galvanic coupling phenomena. Finally, the poor corrosion resistance exhibited by the nitrocarburised sample can be ascribed to the presence of a large amount of ferrite together with little ε solid solution in the surface layer. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905530/abstract [article] Effect of different thermochemical treatments on the electrochemical behaviour of a hot working steel [texte imprimé] / F. Rosalbino, Auteur ; G. Scavino, Auteur ; E. Angelini, Auteur . - 2011 . - pp. 357–361. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 357–361 Mots-clés : Hot  working  steel  Nitriding  Nitrocarburising  Overcarburising  Polarisation  curves Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The X 37CrMoV5 1 KU hot working steel has been quenched and tempered, overcarburised, nitrided and nitrocarburised. The surface layers constituted after the thermochemical treatments were characterised by means of X-ray diffraction (XRD) analyses, optical and scanning electron microscope (SEM) observations, micro- and macrohardness indentations. The electrochemical behaviour was evaluated in two different aggressive environments: 0.1 M Na2SO4 and 0.1 M NaCl solutions. While the overcarburised and the nitrocarburised samples exhibit a poor electrochemical behaviour, the presence of a nitrided surface layer enhances the corrosion resistance. This is attributable to the protective action of the nitrided layer that hinders the anodic dissolution reaction of the matrix, whereas the presence of complex carbides in the overcarburised or nitrocarburised samples causes the preferential dissolution of the ferritic matrix due to galvanic coupling phenomena. Finally, the poor corrosion resistance exhibited by the nitrocarburised sample can be ascribed to the presence of a large amount of ferrite together with little ε solid solution in the surface layer. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905530/abstract

Polyaspartic acid as a green corrosion inhibitor for carbon steel / R. Cui in Materials and corrosion, Vol. 62 N° 4 (Avril 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 362–369 Titre : Polyaspartic acid as a green corrosion inhibitor for carbon steel Type de document : texte imprimé Auteurs : R. Cui, Auteur ; N. Gu, Auteur ; C. Li, Auteur Année de publication : 2011 Article en page(s) : pp. 362–369 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Electrochemical  impedance  spectroscopy  Freundlich-type  isotherm  Green  corrosion  inhibition  Polyaspartic  acid Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The inhibitor effect of the environmentally friendly corrosion inhibitor polyaspartic acid (PASP) on the corrosion of carbon steel in 0.5 M H2SO4 was investigated by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Polarization curve results clearly reveal the fact that PASP is a good anode-type inhibitor. EIS results confirm its corrosion inhibition ability. The inhibition efficiency increases with increasing PASP concentration, and the maximum inhibition efficiency was 80.33% at 10 °C. SEM reveals that a protective film forms on the surface of the inhibited sample. The adsorption of this inhibitor is found to follow the Freundlich adsorption isotherm. A mechanism is proposed to explain the inhibitory action of the corrosion inhibitor. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905511/abstract [article] Polyaspartic acid as a green corrosion inhibitor for carbon steel [texte imprimé] / R. Cui, Auteur ; N. Gu, Auteur ; C. Li, Auteur . - 2011 . - pp. 362–369. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 4 (Avril 2011) . - pp. 362–369 Mots-clés : Electrochemical  impedance  spectroscopy  Freundlich-type  isotherm  Green  corrosion  inhibition  Polyaspartic  acid Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The inhibitor effect of the environmentally friendly corrosion inhibitor polyaspartic acid (PASP) on the corrosion of carbon steel in 0.5 M H2SO4 was investigated by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Polarization curve results clearly reveal the fact that PASP is a good anode-type inhibitor. EIS results confirm its corrosion inhibition ability. The inhibition efficiency increases with increasing PASP concentration, and the maximum inhibition efficiency was 80.33% at 10 °C. SEM reveals that a protective film forms on the surface of the inhibited sample. The adsorption of this inhibitor is found to follow the Freundlich adsorption isotherm. A mechanism is proposed to explain the inhibitory action of the corrosion inhibitor. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905511/abstract

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