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Effect of vitreous enamel coating on the oxidation behavior of Ti6A14V and TiAl alloys at high temperatures / Yuming Xiong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 1 (03/2008)
[article]
Titre : Effect of vitreous enamel coating on the oxidation behavior of Ti6A14V and TiAl alloys at high temperatures Type de document : texte imprimé Auteurs : Yuming Xiong, Auteur ; Shenglong Zhu, Auteur ; Fuhui Wang, Auteur ; Changhee Lee, Auteur Année de publication : 2008 Article en page(s) : p. 93-98 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie des surfaces
Métaux -- Revêtements protecteurs
Oxydation
Revêtement émail
Titane -- AlliagesIndex. décimale : 667.9 Revêtements et enduits Résumé : Vitreous enamel coating is a promising candidate as a high temperature protective coating for titanium (Ti)-based alloys due to its high thermochemical stability, compatibility, and matching thermal expansion coefficient to the substrates. Vitreous enamel coating is economically attractive because of its low cost and easy handling. The oxidation behavior of Ti6A14V (at 700°C) and Ti-48Al (at 800-900°C), with and without the vitreous enamel coating exposed to air, are investigated in this article. The results show that the vitreous enamel coating could markedly protect the substrate (Ti6Al4V and Ti48Al) from oxidation at elevated temperatures. In comparison, the TiAlCr coating might not provide long-term protection for the Ti6Al4V alloys due to the heavy interfacial interdiffusion at high temperatures, although a protective Al2O3 scale could form at the initial oxidation stage. The vitreous enamel coating remains intact, uniform, compact, and adhesive to the substrate, however, with undetectable interfacial reaction after oxidation. It is also worth noting that some new phases form in the coating during oxidation at 900°C, although the protectiveness of the coating seems to be unaffected. DOI : 10.1007/s11998-007-9057-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9057-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3619
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 1 (03/2008) . - p. 93-98[article]Réservation
Réserver ce documentEvaluation of the corrosion protection of defective polyaniline/epoxy coating by localized electrochemical impedance spectroscopy / Yingjun Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)
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Titre : Evaluation of the corrosion protection of defective polyaniline/epoxy coating by localized electrochemical impedance spectroscopy Type de document : texte imprimé Auteurs : Yingjun Zhang, Auteur ; Yawei Shao, Auteur ; Guozhe Meng, Auteur ; Tao Zhang, Auteur ; Fuhui Wang, Auteur Année de publication : 2015 Article en page(s) : p. 777-785 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Epoxydes
Magnésium -- Alliages
Polyaniline
Revêtements protecteurs
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Defective epoxy varnish and hydrofluoric acid-doped polyaniline/epoxy (PANI-HF/EP) coatings were coated on the surface of an AZ91D magnesium alloy. The corrosion protection of the defective coatings was evaluated in 0.05 M NaCl by localized electrochemical impedance spectroscopy. Then, the surface of AZ91D magnesium alloy beneath the coating was analyzed by scanning electron microscopy and energy dispersive X-ray spectroscopy. The results indicated that the defective epoxy varnish coating could not protect the magnesium alloy because it only served as an electrolyte barrier. By contrast, the PANI-HF/EP coating served not only as an electrolyte barrier, but also facilitated the formation of a protective layer by redox processes. Therefore, the defective PANI-HF/EP coating could protect magnesium alloy from corrosion. Note de contenu : - EXPERIMENTAL : Materials and sample preparation - Local electrochemical impedance measurements - SEM and EDS
- RESULTS : LEIS measurements - Surface morphology analysis - Surface component analysis
- DISCUSSION : Corrosion protection of the defective epoxy varnish coating - Corrosion protection of the defective PANI-HF/EP coatingDOI : 10.1007/s11998-015-9679-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9679-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24412
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 777-785[article]Réservation
Réserver ce documentModification of graphene and graphene oxide and their applications in anticorrosive coatings / Jing Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
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Titre : Modification of graphene and graphene oxide and their applications in anticorrosive coatings Type de document : texte imprimé Auteurs : Jing Li, Auteur ; Hongpeng Zheng, Auteur ; Li Liu, Auteur ; Fandi Meng, Auteur ; Yu Cui, Auteur ; Fuhui Wang, Auteur Année de publication : 2021 Article en page(s) : p. 311-331 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Epoxydes
GraphèneLe graphène est un cristal bidimensionnel (monoplan) de carbone dont l'empilement constitue le graphite. Il a été isolé en 2004 par Andre Geim, du département de physique de l'université de Manchester, qui a reçu pour cette découverte le prix Nobel de physique en 2010 avec Konstantin Novoselov. Il peut être produit de deux manières : par extraction mécanique du graphite (graphène exfolié) dont la technique a été mise au point en 2004, ou par chauffage d'un cristal de carbure de silicium, qui permet la libération des atomes de silicium (graphène epitaxié). Record en conduction thermique jusqu'à 5300 W.m-1.K-1. C'est aussi un matériaux conducteur.
Matériaux -- Propriétés barrières
Polymères
Revêtements organiques
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : In this article, the applications and modification methods of graphene-based materials [graphene and graphene oxide (GO)] in an organic anticorrosive coating were reviewed. First, this paper introduces the application of graphene-based materials with barrier property and electrical conductivity in anticorrosive coating and then explains the protection mechanisms, respectively. In addition, this paper puts forward some problems of graphene in the anticorrosive coatings, such as how to solve the dispersion of graphene, how to improve the compatibility between graphene and the polymer matrix, and how to enhance the adhesion between the coating and metal interface. Second, this paper summarizes the reported modification methods of graphene and GO in terms of covalent and noncovalent modification. For covalent modification, the modification methods of different functional groups of GO are summarized, such as modification of epoxy group (–C(O)C–), hydroxyl group (–OH), and carboxyl group (–COOH). As for the noncovalent modification, the modification methods of graphene and GO are summarized from the three aspects of π−π interaction, hydrogen bond interaction, and electrostatic interaction, respectively. Finally, the applications of graphene-based materials in anticorrosive coatings are summarized and prospected. Note de contenu : - Graphene-based anticorrosive coatings : Application of graphene-based anticorrosive coatings - Protection mechanism of graphene-based anticorrosive coating - Problems of graphene-based fillers in anticorrosive coatings
- Modification of graphene-based materials : Covalent modification - Noncovalent modification - Comparison of modification methods
- Table 1 : Summary of covalent modification of GO
- Table 2 : Summary of noncovalent modification of graphene and GODOI : https://doi.org/10.1007/s11998-020-00435-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00435-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35597
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 311-331[article]Réservation
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