Improvement of adherence and anticorrosion properties of an epoxy-polyamide coating on steel by incorporation of an indole-3 butyric acid-modified nanomagnetite / Anh Truc Trinh in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 3 (05/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 3 (05/2016) . - p. 489-499 Titre : Improvement of adherence and anticorrosion properties of an epoxy-polyamide coating on steel by incorporation of an indole-3 butyric acid-modified nanomagnetite Type de document : texte imprimé Auteurs : Anh Truc Trinh, Auteur ; Thu Trang Nguyen, Auteur ; Thu Thuy Thai, Auteur ; Thi Xuan Hang To, Auteur ; Xuan Hoan Nguyen, Auteur ; Anh Son Nguyen, Auteur ; Maëlenn Aufray, Auteur ; Nadine Pébère, Auteur Année de publication : 2016 Article en page(s) : p. 489-499 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. Anticorrosifs Anticorrosion Epoxydes Essais d'adhésion Essais de brouillard salin Métaux -- Revêtements protecteurs Nanoparticules Oxyde de fer Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, synthesized magnetite (Fe3O4) nanoparticles were treated with a corrosion inhibitor, indole-3 butyric acid (IBA) and incorporated in an epoxy-polyamide coating. The coating was applied on a carbon steel substrate. For comparison, coatings without particles or with nontreated Fe3O4 particles were also prepared. The IBA-modified nanomagnetite (IBA–Fe3O4) was characterized by infrared spectroscopy and Zeta potential measurements. The inhibitive action of IBA was shown by electrochemical measurements (polarization curves) performed for a bare carbon steel in 0.1 M NaCl solution containing Fe3O4 or IBA–Fe3O4 nanoparticles. Adherence and anticorrosion properties of the epoxy-based coatings containing Fe3O4 or IBA–Fe3O4 were compared to those of the pure epoxy-polyamide resin by dry and wet adherence measurements and by salt spray test. The results showed significant improvement of the film adherence and higher corrosion protection of the carbon steel in the presence of IBA–Fe3O4. It was concluded that the IBA effect was restricted to the metal/coating interface. Note de contenu : - EXPERIMENTAL : Materials - Synthesis and surface modification of the Fe3O4 nanoparticles - Analytical characterizations - Electrochemical measurements - Differential scanning calorimetry (DSC) - Salt spray test - Adherence tests - RESULTS AND DISCUSSION : Characterization of the IBA-Fe3O4 nanoparticles - Characterization of the epoxy-polyamide coatings - Corrosion protection performance - Adherence measurements DOI : 10.1007/s11998-015-9768-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9768-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26289 [article]

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Practical adhesion measurements of protective coatings on bronze by three-point bending test / Maëlenn Aufray in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 5 (09/2019) . - p. 1465-1477 Titre : Practical adhesion measurements of protective coatings on bronze by three-point bending test Type de document : texte imprimé Auteurs : Maëlenn Aufray, Auteur ; Claudie Josse, Auteur ; Andrea Balbo, Auteur ; Cecilia Monticelli, Auteur ; Erika Svara Fabjan, Auteur ; Luka Skrlep, Auteur ; Tadeja Kosec, Auteur ; Nina Gartner, Auteur ; Carla Martini, Auteur ; Giulia Masi, Auteur ; Cristina Chiavari, Auteur ; Elena Bernardi, Auteur ; Maria Chiara Bignozzi, Auteur ; Luc Robbiola, Auteur ; Marija Babnik, Auteur ; Teja Korsic, Auteur ; Marko Kete, Auteur Année de publication : 2019 Article en page(s) : p. 1465-1477 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Bronze Essais dynamiques Evaluation Flexion trois points Métaux -- Revêtements protecteurs Objets d'art -- Conservation et restauration Patine Revêtements -- Détérioration Index. décimale : 667.9 Revêtements et enduits Résumé : When attempting to sufficiently protect outdoor bronze monuments from corrosion, searches for an effective solution are usually based on coating applications which have a high anticorrosive efficiency. In order to correctly assess the level of protection provided by such coatings, adherence (practical adhesion) measurements need to be performed for the proper evaluation of the deterioration of coating systems with aging. Although a coupled study of adherence with aging would be of great interest, very few such studies are available. In this work, a methodological approach is proposed for the evaluation of coatings applied to metallic cultural heritage monuments of, based on the use of a three-point bending test. Adherence characterization of different protective coatings has been performed both on bare and on traditionally black-patinated bronze coupons (Cu–Sn alloy with 5.9 wt% Sn), which were used as basic model substrates. The investigated coatings were Incralac®, silane, sol–gel oxysilane, and a silane-modified polymethacrylate (an adhesion promoter for fluoropolymer). The results of measurements which were obtained before and after accelerated aging in concentrated acid rain made it possible to more easily differentiate between the various adherence levels of different coating systems. Coupled with adherence measurements, the results of systematic optical and SEM observation of the different failure morphologies are also presented. In the case of the coated bare alloy, adhesive failures were mainly observed. The silane (PropS-SH) coating showed the best adherence. In the case of the patinated bronze test specimens, only cohesive failures occurred. Adherence is directly related to the cohesion of the black patina rather than that of the applied coating. It was observed that aging reduces the level of the adherence. Note de contenu : - EXPERIMENTAL : Materials - The aging method - Practical adhesion measurements - Adhesive failure observation and surface characterization - RESULTS AND DISCUSSION : Coated bare bronze (B) - Coated patinated bronze (P) DOI : 10.1007/s11998-019-00230-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00230-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33025 [article]

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