Documents disponibles écrits par cet auteur

EIS study on pitting corrosion of 7150 aluminum alloy in sodium chloride and hydrochloric acid solution / G. S. Peng in Materials and corrosion, Vol. 61 N° 9 (Septembre 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 9 (Septembre 2010) . - pp. 783–789 Titre : EIS study on pitting corrosion of 7150 aluminum alloy in sodium chloride and hydrochloric acid solution Type de document : texte imprimé Auteurs : G. S. Peng, Auteur ; K. H. Chen, Auteur ; H. C. Fang, Auteur Année de publication : 2011 Article en page(s) : pp. 783–789 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : 7150  aluminum  alloy;  EIS;  MgZn2;  original  oxide  layer;  pitting  corrosion Résumé : The pitting corrosion behavior of 7150 aluminum alloy was studied by electrochemical impedance spectroscopy (EIS) in the sodium chloride and hydrochloric acid solution. Based on EIS features and corrosion morphologies as well as corrosion potential, the process of pitting corrosion could be clearly divided into four stages: at the first stage, the Nyquist diagram was composed of two overlapping capacitive loops at the high-medial frequency and one inductive loop at the low frequency. At the second stage (metastable pits developing stage), there existed one small capacitive loop at the high frequency and one big capacitive loop at the medial frequency. At the third stage (stable pits developing stage), two time constants were more clearly distinguished, corresponding to two obvious capacitive loops. At the fourth stage, there appeared one capacitive loop, attributing to uniform corrosion. An equivalent circuit was designed to fit EIS, and the experimental results and the fitted results had good correspondence. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905413/abstract [article] EIS study on pitting corrosion of 7150 aluminum alloy in sodium chloride and hydrochloric acid solution [texte imprimé] / G. S. Peng, Auteur ; K. H. Chen, Auteur ; H. C. Fang, Auteur . - 2011 . - pp. 783–789. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 9 (Septembre 2010) . - pp. 783–789 Mots-clés : 7150  aluminum  alloy;  EIS;  MgZn2;  original  oxide  layer;  pitting  corrosion Résumé : The pitting corrosion behavior of 7150 aluminum alloy was studied by electrochemical impedance spectroscopy (EIS) in the sodium chloride and hydrochloric acid solution. Based on EIS features and corrosion morphologies as well as corrosion potential, the process of pitting corrosion could be clearly divided into four stages: at the first stage, the Nyquist diagram was composed of two overlapping capacitive loops at the high-medial frequency and one inductive loop at the low frequency. At the second stage (metastable pits developing stage), there existed one small capacitive loop at the high frequency and one big capacitive loop at the medial frequency. At the third stage (stable pits developing stage), two time constants were more clearly distinguished, corresponding to two obvious capacitive loops. At the fourth stage, there appeared one capacitive loop, attributing to uniform corrosion. An equivalent circuit was designed to fit EIS, and the experimental results and the fitted results had good correspondence. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905413/abstract

The effect of recrystallization on corrosion and electrochemical behavior of 7150 Al alloy / G. S. Peng in Materials and corrosion, Vol. 62 N° 1 (Janvier 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 1 (Janvier 2011) . - pp. 35–40 Titre : The effect of recrystallization on corrosion and electrochemical behavior of 7150 Al alloy Type de document : texte imprimé Auteurs : G. S. Peng, Auteur ; K. H. Chen, Auteur ; H. C. Fang, Auteur Année de publication : 2011 Article en page(s) : pp. 35–40 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : 7150  Al  alloy  Cyclic  voltammetry  EIS  Potentiodynamic  polarization  Weight-loss  measurement Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : By weight loss, potentiodynamic polarization, cyclic voltammetry, and electrochemical impedance spectroscopy (EIS) techniques complemented by optical and scanning electron microscopy observations, the effect of recrystallization on the corrosion, and electrochemical behavior of 7150 Al alloy was studied. The results indicated that the high recrystallization fraction 7150-1# was worse than the low recrystallization fraction 7150-2# on corrosion resistance. The analysis of EIS indicated that 7150-1# exhibited obvious pitting corrosion at 5 h immersion time, whereas 7150-2# showed no obvious pitting corrosion even at 33 h. The corrosion route developed along the grain boundary of recrystallization grains, not along the grain boundary of unrecrystallization grains. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905490/abstract [article] The effect of recrystallization on corrosion and electrochemical behavior of 7150 Al alloy [texte imprimé] / G. S. Peng, Auteur ; K. H. Chen, Auteur ; H. C. Fang, Auteur . - 2011 . - pp. 35–40. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 1 (Janvier 2011) . - pp. 35–40 Mots-clés : 7150  Al  alloy  Cyclic  voltammetry  EIS  Potentiodynamic  polarization  Weight-loss  measurement Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : By weight loss, potentiodynamic polarization, cyclic voltammetry, and electrochemical impedance spectroscopy (EIS) techniques complemented by optical and scanning electron microscopy observations, the effect of recrystallization on the corrosion, and electrochemical behavior of 7150 Al alloy was studied. The results indicated that the high recrystallization fraction 7150-1# was worse than the low recrystallization fraction 7150-2# on corrosion resistance. The analysis of EIS indicated that 7150-1# exhibited obvious pitting corrosion at 5 h immersion time, whereas 7150-2# showed no obvious pitting corrosion even at 33 h. The corrosion route developed along the grain boundary of recrystallization grains, not along the grain boundary of unrecrystallization grains. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905490/abstract