Corrosion behavior of 2024 aluminum alloy anodized in presence of permanganate and phosphate ions / Maysam Mohammadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 2 (03/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 2 (03/2013) . - p. 219-229 Titre : Corrosion behavior of 2024 aluminum alloy anodized in presence of permanganate and phosphate ions Type de document : texte imprimé Auteurs : Maysam Mohammadi, Auteur ; Ali Yazdani, Auteur ; Mohammad Ebrahim Bahrololoom, Auteur ; Akram Alfantazi, Auteur Année de publication : 2013 Article en page(s) : p. 219-229 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages Anticorrosifs Anticorrosion Ions inorganiques Métaux -- Oxydation anodique Permanganate de potassium Phosphates Index. décimale : 667.9 Revêtements et enduits Résumé : In this article, the effects of two inorganic corrosion inhibitors, permanganate and phosphate anions, on morphology, composition, thickness, and corrosion resistance of the anodic film formed on 2024 aluminum alloy in sulfuric acid were investigated. Surface morphology of the oxide films were studied by field emission scanning electron microscopy. Electrochemical impedance spectroscopy and potentiodynamic polarization tests were conducted to assess the corrosion resistance of the coatings. These analyses showed that the presence of the mentioned inhibitors changed the coating morphology, especially in the case of phosphate ions. Corrosion results indicated that using inhibitors during the anodizing process increased the corrosion resistance of the anodized samples. The increases were approximately 81% and 97% for 0.05 M of permanganate and phosphate ions, respectively, compared with the anodized coatings in the absence of additives. An increase in the inhibitor concentration results in better corrosion resistance of the aluminum anodic layer. DOI : 10.1007/s11998-012-9459-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9459-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18240 [article]

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On the role of water, temperature, and glass transition in the corrosion protection behavior of epoxy coatings for underground pipelines / Hung M. Ha in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 6 (11/2015) . - p. 1095-1110 Titre : On the role of water, temperature, and glass transition in the corrosion protection behavior of epoxy coatings for underground pipelines Type de document : texte imprimé Auteurs : Hung M. Ha, Auteur ; Akram Alfantazi, Auteur Année de publication : 2015 Article en page(s) : p. 1095-1110 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes Hautes températures Pipelines -- Revêtements protecteurs Revêtements -- Corrosion Revêtements -- Détérioration Revêtements organiques Transition vitreuse Index. décimale : 667.9 Revêtements et enduits Résumé : Water transport kinetics in the coatings were markedly enhanced and the coating impedances decreased exponentially as temperature increased. The effect of temperature on the coating impedance was attributed to the change in the defect area fraction caused by the thermal expansion of the polymers. The temperature dependence of coating impedance was reversible in a non-aqueous environment but was irreversible in an aqueous environment. This is attributed to the plasticization effect of water on the polymer chains. The effect of glass transition on coating impedances during a short period of exposure to heat source was insignificant. Note de contenu : - EXPERIMENT : Materials and electrolytes - Differential scanning calorimetry (DSC) - Fourier transform infrared spectroscopy (FTIR) - Water uptake - Electrochemical impedance spectroscopy (EIS) - EIS data analysis - RESULTS : Determination of Tg - Water absorption, desorption, and transport - Effect of water absorption and temperature on polymer chemistry - Effect of temperature on coating resistance and capacitance - Effect of repeated heating and cooling on coating performance DOI : 10.1007/s11998-015-9705-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9705-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24968 [article]

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