Eco-friendly protective coatings based on poly(urethane sulfone amide) dispersions for carbon steel / H. A. Mohamed in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 2 (03/2017) . - p. 437-446 Titre : Eco-friendly protective coatings based on poly(urethane sulfone amide) dispersions for carbon steel Type de document : texte imprimé Auteurs : H. A. Mohamed, Auteur ; S. M. M. Morsi, Auteur ; B. M. Badran, Auteur ; A. M. Rabie, Auteur Année de publication : 2017 Article en page(s) : p. 437-446 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone Anticorrosifs Anticorrosion Copolymère uréthane sulfone amide Dispersions et suspensions Métaux -- Revêtements protecteurs Polyuréthanes Index. décimale : 667.9 Revêtements et enduits Résumé : Eight eco-friendly protective coatings (PU, PUA1, PUA3, PUA5, T30PUA5, T60PUA5, T90PUA5, and T120PUA5), were formulated based on series of laboratory-synthesized poly(urethane co-sulfone amide) copolymer dispersions (CPDs) as binders. The first four formulations were based on CPDs prepared by the copolymerization reaction of PU based on castor oil (CO) with aromatic polyamide sulfone (APAS) in four different concentrations (0%, 1%, 3%, and 5% solid to solid). The other four formulations were based on CPDs synthesized by the copolymerization reaction of PU based on transesterified CO with triethanolamine (CON) at different time intervals (30, 60, 90, and 120 min) with APAS at only one concentration. The effect of the degree of copolymerization and transesterification reactions on the physical, chemical, and mechanical properties of the formulated coatings was studied. The results showed that the copolymerization and transesterification reactions led to an increase in the density and viscosity of the coating formulations. Additionally, the hardness of the dried films increased with copolymerization and transesterification reactions. The transesterification reaction decreased the adhesion force of the coated films. The copolymerization process caused a decrease in the water uptake of the coated films. However, the transesterification reaction increased the water uptake. The prepared formulations were applied on carbon steel substrates to estimate their efficiency as eco-friendly protective coatings for steel. The weight loss of the coated steel panels decreased with an increase in the amount of the copolymerized APAS within the PU chains, while it increased with an increase in the transesterification time of the CON used in the preparation of the coated copolymers. From the corrosion test results, PUA5 and T30PUA5 showed the best anticorrosive performance as estimated from the degree of rusting, weight loss measurements, and failure at scribe. DOI : 10.1007/s11998-016-9861-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9861-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28158 [article]

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New waterborne paints with different binders and corrosion inhibition application / H. A. Mohamed in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 1 (01/2010)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 1 (01/2010) . - p. 85-89 Titre : New waterborne paints with different binders and corrosion inhibition application Type de document : texte imprimé Auteurs : H. A. Mohamed, Auteur Année de publication : 2010 Article en page(s) : p. 85-89 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Adsorption Anticorrosifs Anticorrosion Liants Métaux -- Revêtements protecteurs Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Waterborne paint formulations based on three different emulsion resins were prepared with different pigment volume concentration (PVC). The effect of a prepared waterborne organic corrosion inhibitor with the best formula of each binder was studied. The role of binders on the corrosion inhibition of steel in the absence and presence of the corrosion inhibitor was studied. Physical, chemical, and mechanical properties, weight loss, corrosion resistance, and water up-take tests in the absence and presence of the corrosion inhibitor revealed that the protective properties of the three binders used at their optimum PVC against corrosion could be arranged in the following order: short oil alkyd > Urabrid AC 100 > acrylic emulsion resins. The prepared corrosion inhibitor showed excellent inhibition efficiency with the three used binders. DOI : 10.1007/s11998-009-9183-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9183-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8350 [article]

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