Dépouillements

Corrosion fatigue of a manganese–nitrogen stabilized austenitic stainless steel / R. Sonnleitner in Materials and corrosion, Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 97–104 Titre : Corrosion fatigue of a manganese–nitrogen stabilized austenitic stainless steel Type de document : texte imprimé Auteurs : R. Sonnleitner, Auteur ; G. Mori, Auteur ; M. Panzenböck, Auteur Année de publication : 2010 Article en page(s) : pp. 97–104 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Austenite;  corrosion  fatigue;  fracture  surface;  high  nitrogen  steel;  stainless  steel Résumé : Austenitic chromium–manganese–nitrogen stabilized stainless steels have been developed to replace chromium–nickel–nitrogen stainless steels in certain applications. In comparison, chromium–manganese–nitrogen steels have improved mechanical properties and acceptable corrosion resistance in hot, high chloride containing media. In this paper, corrosion fatigue investigations of a solution annealed and for practice more relevant 14% cold worked high alloyed chromium–manganese–nitrogen steel have been done. Inert glycerine was used as reference media and 62% calcium chloride solution as corrosive media, both aerated at a temperature of 120 °C. The stress ratio between upper and lower stress levels was 0.05 (tension–tension loading) to avoid the destruction of the fracture surfaces. As testing frequency for the dynamic experiments, 20 Hz was chosen considering possible application areas. Maximum stress versus number of cycles curves were recorded and representative specimens were investigated in a scanning electron microscope. In addition, electrochemical tests, exposure tests and constant load tests were done. This paper shows results on the corrosion fatigue of a manganese–nitrogen stabilized austenitic steel in a hot high chloride containing salt solution and helps to get a better understanding of occurring failure mechanisms. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905264/abstract [article] Corrosion fatigue of a manganese–nitrogen stabilized austenitic stainless steel [texte imprimé] / R. Sonnleitner, Auteur ; G. Mori, Auteur ; M. Panzenböck, Auteur . - 2010 . - pp. 97–104. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 97–104 Mots-clés : Austenite;  corrosion  fatigue;  fracture  surface;  high  nitrogen  steel;  stainless  steel Résumé : Austenitic chromium–manganese–nitrogen stabilized stainless steels have been developed to replace chromium–nickel–nitrogen stainless steels in certain applications. In comparison, chromium–manganese–nitrogen steels have improved mechanical properties and acceptable corrosion resistance in hot, high chloride containing media. In this paper, corrosion fatigue investigations of a solution annealed and for practice more relevant 14% cold worked high alloyed chromium–manganese–nitrogen steel have been done. Inert glycerine was used as reference media and 62% calcium chloride solution as corrosive media, both aerated at a temperature of 120 °C. The stress ratio between upper and lower stress levels was 0.05 (tension–tension loading) to avoid the destruction of the fracture surfaces. As testing frequency for the dynamic experiments, 20 Hz was chosen considering possible application areas. Maximum stress versus number of cycles curves were recorded and representative specimens were investigated in a scanning electron microscope. In addition, electrochemical tests, exposure tests and constant load tests were done. This paper shows results on the corrosion fatigue of a manganese–nitrogen stabilized austenitic steel in a hot high chloride containing salt solution and helps to get a better understanding of occurring failure mechanisms. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905264/abstract

Ex situ TEM observation of localized attack on AA 6061 / D. M. Sun in Materials and corrosion, Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 105–110 Titre : Ex situ TEM observation of localized attack on AA 6061 Type de document : texte imprimé Auteurs : D. M. Sun, Auteur ; Y. M. Jiang, Auteur ; Q. W. Xiang, Auteur Année de publication : 2010 Article en page(s) : pp. 105–110 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Aluminum  alloy  6061;  localized  corrosion;  transmission  electron  microscopy Résumé : Ex situ transmission electron microscopy (TEM) was used in conjunction with energy dispersed spectrometry (EDS) to monitor evolution near the pre-selected inclusions during initial stages of localized dissolution on the aluminum alloy (AA) 6061 immersed in 0.1 M NaCl solution. On the alloy TEM foil, Mg2Si phase particles were observed to preferentially dissolve after 3 min immersion. Nevertheless, different dissolution behaviors were observed to form in the vicinities of the different structure Fe-rich precipitates; the trenches were observed near the anorthic phase particle, but no obvious priority dissolution was detected in the vicinity of hexagonal phase particles. The preferential sites of alloy dissolution were found to depend on both the component and the structure of the intermetallics. The shift of electrochemical potential was found to relate the dissolution of the heterogeneous phases. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905267/abstract [article] Ex situ TEM observation of localized attack on AA 6061 [texte imprimé] / D. M. Sun, Auteur ; Y. M. Jiang, Auteur ; Q. W. Xiang, Auteur . - 2010 . - pp. 105–110. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 105–110 Mots-clés : Aluminum  alloy  6061;  localized  corrosion;  transmission  electron  microscopy Résumé : Ex situ transmission electron microscopy (TEM) was used in conjunction with energy dispersed spectrometry (EDS) to monitor evolution near the pre-selected inclusions during initial stages of localized dissolution on the aluminum alloy (AA) 6061 immersed in 0.1 M NaCl solution. On the alloy TEM foil, Mg2Si phase particles were observed to preferentially dissolve after 3 min immersion. Nevertheless, different dissolution behaviors were observed to form in the vicinities of the different structure Fe-rich precipitates; the trenches were observed near the anorthic phase particle, but no obvious priority dissolution was detected in the vicinity of hexagonal phase particles. The preferential sites of alloy dissolution were found to depend on both the component and the structure of the intermetallics. The shift of electrochemical potential was found to relate the dissolution of the heterogeneous phases. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905267/abstract

Influence of alkali, silicate, and sulfate content of carbonated concrete pore solution on mild steel corrosion behavior / B. Huet in Materials and corrosion, Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 111–124 Titre : Influence of alkali, silicate, and sulfate content of carbonated concrete pore solution on mild steel corrosion behavior Type de document : texte imprimé Auteurs : B. Huet, Auteur ; V. L'Hostis, Auteur ; L. Tricheux, Auteur Année de publication : 2010 Article en page(s) : pp. 111–124 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Alkali;  carbonate;  cement;  mild  steel;  silicate;  sulfate Résumé : The increase in the rebar corrosion rate due to the concrete carbonation is the major cause of reinforced concrete degradation. The aim of this study was to investigate the corrosion behavior of mild steel rebars in simulated carbonated concrete solution. For this purpose, thermodynamic calculations, electrochemical techniques, gravimetric measurements, and surface analyses were used. Thermodynamic investigations of the nature of the interstitial solution provides an estimation of the influence of sulfate (equation image) and alkali (Na+, K+) content on carbonate alkalinity of the CO2/H2O open system (pCO2  = 0.3 mbar). In this system, calcium-silicate hydrates (C–S–H) remain thermodynamically unstable and amorphous silica controls silicate aqueous content at 100 ppm. Electrochemical results highlight a decrease in the corrosion rate with increasing carbonate alkalinity and the introduction of silicate. The introduction of sulfate at fixed carbonate alkalinity shows a dual effect: at high carbonate alkalinity, the corrosion rate is increased whereas at low carbonate alkalinity, corrosion rate is decreased. Those results are supported by surface analysis. Authors conclude that silicate and sulfate release from cement hydrates and fixation of alkali on carbonated hydrates are key parameters to estimate mild steel corrosion in carbonated concrete. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905244/abstract [article] Influence of alkali, silicate, and sulfate content of carbonated concrete pore solution on mild steel corrosion behavior [texte imprimé] / B. Huet, Auteur ; V. L'Hostis, Auteur ; L. Tricheux, Auteur . - 2010 . - pp. 111–124. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 111–124 Mots-clés : Alkali;  carbonate;  cement;  mild  steel;  silicate;  sulfate Résumé : The increase in the rebar corrosion rate due to the concrete carbonation is the major cause of reinforced concrete degradation. The aim of this study was to investigate the corrosion behavior of mild steel rebars in simulated carbonated concrete solution. For this purpose, thermodynamic calculations, electrochemical techniques, gravimetric measurements, and surface analyses were used. Thermodynamic investigations of the nature of the interstitial solution provides an estimation of the influence of sulfate (equation image) and alkali (Na+, K+) content on carbonate alkalinity of the CO2/H2O open system (pCO2  = 0.3 mbar). In this system, calcium-silicate hydrates (C–S–H) remain thermodynamically unstable and amorphous silica controls silicate aqueous content at 100 ppm. Electrochemical results highlight a decrease in the corrosion rate with increasing carbonate alkalinity and the introduction of silicate. The introduction of sulfate at fixed carbonate alkalinity shows a dual effect: at high carbonate alkalinity, the corrosion rate is increased whereas at low carbonate alkalinity, corrosion rate is decreased. Those results are supported by surface analysis. Authors conclude that silicate and sulfate release from cement hydrates and fixation of alkali on carbonated hydrates are key parameters to estimate mild steel corrosion in carbonated concrete. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905244/abstract

The stress corrosion cracking behaviour of heat-treated Al–Zn–Mg–Cu alloy in modified salt spray fog testing / J. Oñoro in Materials and corrosion, Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 125–129 Titre : The stress corrosion cracking behaviour of heat-treated Al–Zn–Mg–Cu alloy in modified salt spray fog testing Type de document : texte imprimé Auteurs : J. Oñoro, Auteur Année de publication : 2010 Article en page(s) : pp. 125–129 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : 7075;  aluminium  alloys;  fog  chamber;  RRA;  stress  corrosion  cracking  (SCC) Résumé : The stress corrosion cracking behaviour of 7075 (Al–Zn–Mg–Cu) alloy have been studied in a salt spray fog chamber with two vapourised aqueous solutions (0 and 5% NaCl). The paper analyses the stress corrosion resistance of 7075 aluminium alloy with several precipitation-ageing heat treatments. The results are compared with that obtained in 3.5% NaCl aqueous solution at 20 °C. The salt spray fog testing has permitted a good evaluation of SCC susceptibility in 7075 alloy. All temper conditions studied were susceptible to SCC in the different environments tested. 7075-T6 temper was the most susceptible, while in all the cases studied 7075-T73 temper was the least susceptible. Compared to 7075-T6, 7075-RRA temper improved the resistance against the SCC process, but the mechanical properties obtained were lower. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905255/abstract [article] The stress corrosion cracking behaviour of heat-treated Al–Zn–Mg–Cu alloy in modified salt spray fog testing [texte imprimé] / J. Oñoro, Auteur . - 2010 . - pp. 125–129. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 125–129 Mots-clés : 7075;  aluminium  alloys;  fog  chamber;  RRA;  stress  corrosion  cracking  (SCC) Résumé : The stress corrosion cracking behaviour of 7075 (Al–Zn–Mg–Cu) alloy have been studied in a salt spray fog chamber with two vapourised aqueous solutions (0 and 5% NaCl). The paper analyses the stress corrosion resistance of 7075 aluminium alloy with several precipitation-ageing heat treatments. The results are compared with that obtained in 3.5% NaCl aqueous solution at 20 °C. The salt spray fog testing has permitted a good evaluation of SCC susceptibility in 7075 alloy. All temper conditions studied were susceptible to SCC in the different environments tested. 7075-T6 temper was the most susceptible, while in all the cases studied 7075-T73 temper was the least susceptible. Compared to 7075-T6, 7075-RRA temper improved the resistance against the SCC process, but the mechanical properties obtained were lower. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905255/abstract

Impeding corrosion of sintered NdFeB magnets with titanium nitride coating / A. Ali in Materials and corrosion, Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 130–135 Titre : Impeding corrosion of sintered NdFeB magnets with titanium nitride coating Type de document : texte imprimé Auteurs : A. Ali, Auteur ; A. Ahmad, Auteur ; K. M. Deen, Auteur Année de publication : 2010 Article en page(s) : pp. 130–135 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Electrochemical  impedance  spectroscopy;  pits  re-passivation;  sintered  NdFeB  Magnets Résumé : Sintered NdFeB magnets have poor corrosion resistance that renders them susceptible to corrosion in industrial and marine environments. This paper evaluates the properties of cathodic arc physical vapour deposited (CAPVD) titanium nitride coating for corrosion protection of sintered NdFeB permanent magnets. The performance of titanium nitride coating has been compared to the electrodeposited nickel–copper–nickel multilayer coating. The rates of coatings degradation in simulated marine environment were estimated with electrochemical impedance spectroscopy (EIS). Cyclic polarization was carried out to assess the pitting potential. The surface chemistry and coating morphologies were studied with scanning electron microscope (SEM). X-ray diffraction (XRD) was used for qualitative phase analyses of coatings and the substrate. It was figured out that the charge transfer resistance of CAPVD titanium nitride coating increased with exposure time. The negative rate of Rp-degradation for titanium nitride coating compared to the nickel–copper–nickel multilayer for equivalent exposure time is a unique and valuable result. Polarization results showed that ‘pits re-passivation’ of titanium nitride coating could be responsible for the extended corrosion protection of the NdFeB substrate. The magnetic properties remained comparable for both types of coatings. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905265/abstract [article] Impeding corrosion of sintered NdFeB magnets with titanium nitride coating [texte imprimé] / A. Ali, Auteur ; A. Ahmad, Auteur ; K. M. Deen, Auteur . - 2010 . - pp. 130–135. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 130–135 Mots-clés : Electrochemical  impedance  spectroscopy;  pits  re-passivation;  sintered  NdFeB  Magnets Résumé : Sintered NdFeB magnets have poor corrosion resistance that renders them susceptible to corrosion in industrial and marine environments. This paper evaluates the properties of cathodic arc physical vapour deposited (CAPVD) titanium nitride coating for corrosion protection of sintered NdFeB permanent magnets. The performance of titanium nitride coating has been compared to the electrodeposited nickel–copper–nickel multilayer coating. The rates of coatings degradation in simulated marine environment were estimated with electrochemical impedance spectroscopy (EIS). Cyclic polarization was carried out to assess the pitting potential. The surface chemistry and coating morphologies were studied with scanning electron microscope (SEM). X-ray diffraction (XRD) was used for qualitative phase analyses of coatings and the substrate. It was figured out that the charge transfer resistance of CAPVD titanium nitride coating increased with exposure time. The negative rate of Rp-degradation for titanium nitride coating compared to the nickel–copper–nickel multilayer for equivalent exposure time is a unique and valuable result. Polarization results showed that ‘pits re-passivation’ of titanium nitride coating could be responsible for the extended corrosion protection of the NdFeB substrate. The magnetic properties remained comparable for both types of coatings. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905265/abstract

Corrosion monitoring of hydrogen by HUP probe in the presence of sulphide and thiourea / A. Abbassi in Materials and corrosion, Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 136–140 Titre : Corrosion monitoring of hydrogen by HUP probe in the presence of sulphide and thiourea Type de document : texte imprimé Auteurs : A. Abbassi, Auteur ; A. Mihi, Auteur ; R. Benbouta, Auteur Année de publication : 2010 Article en page(s) : pp. 136–140 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : AC  impedance;  corrosion;  electrochemical  hydrogen  probe;  hydrogen  uptake;  weight  loss Résumé : The effect of sulphide and thiourea on hydrogen uptake during the corrosion of steel in deaerated pH3 has been studied using an electrochemical hydrogen probe incorporating a solid electrolyte (HUP) and lead dioxide (PbO2) as a reference electrode. This probe has been used for the quantitative determination of the hydrogen activity generated during the corrosion of steel. The sensor voltage implies an average equivalent hydrogen pressure in uncharged steel of 2 × 10−18 atmospheres. During the corrosion of steel, this value increases by very large amounts; thus in deaerated pH3, the equivalent pressure rose by 1024.5 in the presence of 200 ppm sulphide and by 102 in the presence of 100 ppm thiourea. Weight loss and AC impedance methods were also performed under the same conditions as the hydrogen measurements. The hydrogen probe data were correlated with a.c impedance and weight loss results in order to understand the effect of S2− and thiourea on hydrogen uptake. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905250/abstract [article] Corrosion monitoring of hydrogen by HUP probe in the presence of sulphide and thiourea [texte imprimé] / A. Abbassi, Auteur ; A. Mihi, Auteur ; R. Benbouta, Auteur . - 2010 . - pp. 136–140. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 136–140 Mots-clés : AC  impedance;  corrosion;  electrochemical  hydrogen  probe;  hydrogen  uptake;  weight  loss Résumé : The effect of sulphide and thiourea on hydrogen uptake during the corrosion of steel in deaerated pH3 has been studied using an electrochemical hydrogen probe incorporating a solid electrolyte (HUP) and lead dioxide (PbO2) as a reference electrode. This probe has been used for the quantitative determination of the hydrogen activity generated during the corrosion of steel. The sensor voltage implies an average equivalent hydrogen pressure in uncharged steel of 2 × 10−18 atmospheres. During the corrosion of steel, this value increases by very large amounts; thus in deaerated pH3, the equivalent pressure rose by 1024.5 in the presence of 200 ppm sulphide and by 102 in the presence of 100 ppm thiourea. Weight loss and AC impedance methods were also performed under the same conditions as the hydrogen measurements. The hydrogen probe data were correlated with a.c impedance and weight loss results in order to understand the effect of S2− and thiourea on hydrogen uptake. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905250/abstract

Quantum chemical studies of some amino acids on the corrosion of cobalt in sulfuric acid solution / G. Gece in Materials and corrosion, Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 141–146 Titre : Quantum chemical studies of some amino acids on the corrosion of cobalt in sulfuric acid solution Type de document : texte imprimé Auteurs : G. Gece, Auteur ; S. Bilgiç, Auteur ; Ö. Türksen, Auteur Année de publication : 2010 Article en page(s) : pp. 141–146 Note générale : Génie mécanisue Langues : Anglais (eng) Mots-clés : Amino  acid;  corrosion;  DFT;  inhibitor;  PM3;  quantum  chemical  calculations Résumé : The inhibitive effect of some amino acids, glycine (Gly), alanine (Ala), valine (Val), leucine (Leu), isoleucine (Ile), serine (Ser), threonine (Thr), methionine (Met), phenylalanine (Phe), tyrosine (Tyr), trytophan (Try), aspartic acid (Asp), asparagine (Asn), glutamic acid (Glu), and lysine (Lys) against the corrosion of cobalt surface is studied by means of semiempirical and density functional methods. The calculated quantum chemical parameters correlated to the inhibition efficiency are, the highest occupied molecular orbital (HOMO), the lowest unoccupied molecular orbital (LUMO), the energy gap (ΔE), and Mulliken charges. It is found that the calculated results satisfactorily support the experimental findings. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905251/abstract [article] Quantum chemical studies of some amino acids on the corrosion of cobalt in sulfuric acid solution [texte imprimé] / G. Gece, Auteur ; S. Bilgiç, Auteur ; Ö. Türksen, Auteur . - 2010 . - pp. 141–146. Génie mécanisue Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 141–146 Mots-clés : Amino  acid;  corrosion;  DFT;  inhibitor;  PM3;  quantum  chemical  calculations Résumé : The inhibitive effect of some amino acids, glycine (Gly), alanine (Ala), valine (Val), leucine (Leu), isoleucine (Ile), serine (Ser), threonine (Thr), methionine (Met), phenylalanine (Phe), tyrosine (Tyr), trytophan (Try), aspartic acid (Asp), asparagine (Asn), glutamic acid (Glu), and lysine (Lys) against the corrosion of cobalt surface is studied by means of semiempirical and density functional methods. The calculated quantum chemical parameters correlated to the inhibition efficiency are, the highest occupied molecular orbital (HOMO), the lowest unoccupied molecular orbital (LUMO), the energy gap (ΔE), and Mulliken charges. It is found that the calculated results satisfactorily support the experimental findings. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905251/abstract

Corrosion inhibition of mild steel in hydrochloric acid by 6-aminohexanoic acid / M. Abdeli in Materials and corrosion, Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 147–151 Titre : Corrosion inhibition of mild steel in hydrochloric acid by 6-aminohexanoic acid Type de document : texte imprimé Auteurs : M. Abdeli, Auteur ; N. P. Ahmadi, Auteur ; R. A. Khosroshahi, Auteur Année de publication : 2010 Article en page(s) : pp. 147–151 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : 6-aminohexanoic  acid;  inhibitor  efficiency;  mild  steel Résumé : The inhibiting behavior of 6-aminohexanoic acid (C6H13NO2) on mild steel corrosion in 1 M HCl as corroding solution at 25 °C was evaluated by weight loss, polarization, and electrochemical impedance spectroscopy (EIS) methods. The weight loss, polarization, and EIS measurements were relatively in good agreement together. Results obtained by the three methods showed that the inhibition efficiency (%IE) increases with increasing the concentration of 6-aminohexanoic acid up to 6.86 × 10−05 M (about %IE = 80). It was also found that the adsorptive behavior of the investigated inhibitor on the steel surface followed Langmuir-type isotherm, the 6-aminohexanoic acid acted as a mixed type inhibitor and its inhibition mechanism obeys from the chemisorption interaction between 6-aminohexanoic acid and the mild steel. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905261/abstract [article] Corrosion inhibition of mild steel in hydrochloric acid by 6-aminohexanoic acid [texte imprimé] / M. Abdeli, Auteur ; N. P. Ahmadi, Auteur ; R. A. Khosroshahi, Auteur . - 2010 . - pp. 147–151. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 147–151 Mots-clés : 6-aminohexanoic  acid;  inhibitor  efficiency;  mild  steel Résumé : The inhibiting behavior of 6-aminohexanoic acid (C6H13NO2) on mild steel corrosion in 1 M HCl as corroding solution at 25 °C was evaluated by weight loss, polarization, and electrochemical impedance spectroscopy (EIS) methods. The weight loss, polarization, and EIS measurements were relatively in good agreement together. Results obtained by the three methods showed that the inhibition efficiency (%IE) increases with increasing the concentration of 6-aminohexanoic acid up to 6.86 × 10−05 M (about %IE = 80). It was also found that the adsorptive behavior of the investigated inhibitor on the steel surface followed Langmuir-type isotherm, the 6-aminohexanoic acid acted as a mixed type inhibitor and its inhibition mechanism obeys from the chemisorption interaction between 6-aminohexanoic acid and the mild steel. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905261/abstract

Corrosion resistant performances of Al-rich epoxy resin based paint on arc-sprayed Al coating / Z. Wang in Materials and corrosion, Vol. 61 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 152–156 Titre : Corrosion resistant performances of Al-rich epoxy resin based paint on arc-sprayed Al coating Type de document : texte imprimé Auteurs : Z. Wang, Auteur ; L. M. Liu, Auteur Année de publication : 2010 Article en page(s) : pp. 152–156 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Al-rich  epoxy  resin  based  paint;  coatings;  corrosion  resistance;  penetration Résumé : Electrical conductive Al-rich epoxy resin based paint with an acceptable surface was for the first time prepared on an arc-sprayed aluminium coating surface successfully. Adhesion test and salt solution immersion test (SSIT) with complementary measurements including electron probe microanalysis (EPMA) and Raman spectroscopy were employed. Adhesion properties of the epoxy resin pigmented with Al particles did not degrade. Besides, because of the close Al particle–resin integration and the tight adhesion in the paint–coating interface, the strong adherence of corrosion products on Al particles, as well as probable passivation of Al particles, the paint showed no worse corrosion resistance properties than the epoxy resin and corroded at a similar rate to the epoxy resin, uniformly, slowly and slightly, protecting the coating base as a barrier type film. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905242/abstract [article] Corrosion resistant performances of Al-rich epoxy resin based paint on arc-sprayed Al coating [texte imprimé] / Z. Wang, Auteur ; L. M. Liu, Auteur . - 2010 . - pp. 152–156. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 2 (Fevrier 2010) . - pp. 152–156 Mots-clés : Al-rich  epoxy  resin  based  paint;  coatings;  corrosion  resistance;  penetration Résumé : Electrical conductive Al-rich epoxy resin based paint with an acceptable surface was for the first time prepared on an arc-sprayed aluminium coating surface successfully. Adhesion test and salt solution immersion test (SSIT) with complementary measurements including electron probe microanalysis (EPMA) and Raman spectroscopy were employed. Adhesion properties of the epoxy resin pigmented with Al particles did not degrade. Besides, because of the close Al particle–resin integration and the tight adhesion in the paint–coating interface, the strong adherence of corrosion products on Al particles, as well as probable passivation of Al particles, the paint showed no worse corrosion resistance properties than the epoxy resin and corroded at a similar rate to the epoxy resin, uniformly, slowly and slightly, protecting the coating base as a barrier type film. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905242/abstract

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