Documents disponibles écrits par cet auteur

Effect of annealing on the stress corrosion cracking of α - brass in aqueous electrolytes containing aggressive ions / Nageh K. Allam in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9529–9533 Titre : Effect of annealing on the stress corrosion cracking of α - brass in aqueous electrolytes containing aggressive ions Type de document : texte imprimé Auteurs : Nageh K. Allam, Auteur ; Ahmed Abdel Nazeer, Auteur ; Elsayed A. Ashour, Auteur Année de publication : 2010 Article en page(s) : pp. 9529–9533 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Aqueous  electrolytes Résumé : A continuing challenge in materials design is the achievement of greater operational efficiency through improvements in performance criterion, particularly, high strength and service lifetime characteristics. In this study, we report on the effect of heat treatment (annealing) on the stress corrosion cracking (SCC) behavior of α-brass (71Cu−28Zn) in aqueous electrolytes containing some aggressive anions (Cl−, ClO3−, NO2−, and SO42−). The annealed specimens suffered from SCC in all tested electrolytes under the anodic polarization conditions while they were susceptible to SCC only in NaNO2 and Na2SO4 solutions under the open circuit condition. The susceptibility toward SCC was found to decrease considerably in NaCl, KClO3, and Na2SO4 solutions and very slightly in NaNO2 solutions upon annealing the specimens. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101603w [article] Effect of annealing on the stress corrosion cracking of α - brass in aqueous electrolytes containing aggressive ions [texte imprimé] / Nageh K. Allam, Auteur ; Ahmed Abdel Nazeer, Auteur ; Elsayed A. Ashour, Auteur . - 2010 . - pp. 9529–9533. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9529–9533 Mots-clés : Aqueous  electrolytes Résumé : A continuing challenge in materials design is the achievement of greater operational efficiency through improvements in performance criterion, particularly, high strength and service lifetime characteristics. In this study, we report on the effect of heat treatment (annealing) on the stress corrosion cracking (SCC) behavior of α-brass (71Cu−28Zn) in aqueous electrolytes containing some aggressive anions (Cl−, ClO3−, NO2−, and SO42−). The annealed specimens suffered from SCC in all tested electrolytes under the anodic polarization conditions while they were susceptible to SCC only in NaNO2 and Na2SO4 solutions under the open circuit condition. The susceptibility toward SCC was found to decrease considerably in NaCl, KClO3, and Na2SO4 solutions and very slightly in NaNO2 solutions upon annealing the specimens. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101603w

Effect of glycine on the electrochemical and stress corrosion cracking behavior of Cu10Ni alloy in sulfide polluted salt water / Ahmed Abdel Nazeer in Industrial & engineering chemistry research, Vol. 50 N° 14 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 14 (Juillet 2011) . - pp. 8796–8802 Titre : Effect of glycine on the electrochemical and stress corrosion cracking behavior of Cu10Ni alloy in sulfide polluted salt water Type de document : texte imprimé Auteurs : Ahmed Abdel Nazeer, Auteur ; Nageh K. Allam, Auteur ; Gehan I. Youssef, Auteur Année de publication : 2011 Article en page(s) : pp. 8796–8802 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Glycine  Electrochemical  Corrosion  cracking Résumé : Corrosion is a natural and inevitable problem that is still a challenge in materials design, with regard to achieving greater operational efficiency. In this study, the electrochemical and stress corrosion cracking (SCC) behavior of Cu10Ni alloy in a 3.5% NaCl solution in the presence of different concentrations of sulfide ions were studied. The presence of sulfide ions has been shown to increase the susceptibility of the material to SCC at different strain rates. The addition of glycine (gly) to the test electrolyte increased the time to failure by changing the mode of failure from brittle transgranular cracking to ductile failure. Therefore, gly can be considered as a potential environmentally friendly corrosion inhibitor. The electrochemical measurements showed that gly acts as a mixed corrosion inhibitor. The synergistic effect of potassium iodide (KI) and gly is also investigated. Electrochemical frequency modulation (EFM) and potentiodynamic polarization data are in good agreement with the SCC results. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200763b [article] Effect of glycine on the electrochemical and stress corrosion cracking behavior of Cu10Ni alloy in sulfide polluted salt water [texte imprimé] / Ahmed Abdel Nazeer, Auteur ; Nageh K. Allam, Auteur ; Gehan I. Youssef, Auteur . - 2011 . - pp. 8796–8802. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 14 (Juillet 2011) . - pp. 8796–8802 Mots-clés : Glycine  Electrochemical  Corrosion  cracking Résumé : Corrosion is a natural and inevitable problem that is still a challenge in materials design, with regard to achieving greater operational efficiency. In this study, the electrochemical and stress corrosion cracking (SCC) behavior of Cu10Ni alloy in a 3.5% NaCl solution in the presence of different concentrations of sulfide ions were studied. The presence of sulfide ions has been shown to increase the susceptibility of the material to SCC at different strain rates. The addition of glycine (gly) to the test electrolyte increased the time to failure by changing the mode of failure from brittle transgranular cracking to ductile failure. Therefore, gly can be considered as a potential environmentally friendly corrosion inhibitor. The electrochemical measurements showed that gly acts as a mixed corrosion inhibitor. The synergistic effect of potassium iodide (KI) and gly is also investigated. Electrochemical frequency modulation (EFM) and potentiodynamic polarization data are in good agreement with the SCC results. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200763b