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Fabrication of graphene-coated poly(glycidyl methacrylate) microspheres by electrostatic interaction and their application in epoxy anticorrosion coatings / Meng Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
[article]
Titre : Fabrication of graphene-coated poly(glycidyl methacrylate) microspheres by electrostatic interaction and their application in epoxy anticorrosion coatings Type de document : texte imprimé Auteurs : Meng Li, Auteur ; Yiyi Li, Auteur ; Jiatian Zhang, Auteur ; Dandan Zhang, Auteur ; Jie Li, Auteur ; Kaibin He, Auteur ; Yiting Xu, Auteur ; Birong Zeng, Auteur ; Lizong Dai, Auteur Année de publication : 2021 Article en page(s) : p. 383–396 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Composites
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.
Polyméthacrylate de glycidyle
Revêtements organiques
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : The uneven dispersion of graphene in the resin matrix hinders its application in anticorrosion coatings. This study reports a new method where graphene oxide (GO) is coated on the surface of the poly(glycidyl methacrylate) (PGMA) microspheres to promote the dispersion of GO in epoxy resin (EP) to improve the anticorrosion performance of EP. GO-coated PGMA microspheres (PGMA@GO) were successfully fabricated by electrostatic interaction, which was confirmed by Fourier transform infrared spectroscopy, X-ray diffraction, Raman spectroscopy, transmission electron microscopy, and zeta potential analysis. The scanning electron microscopy results showed that the PGMA microspheres were uniformly coated with GO, when the weight ratio of PGMA@GO was 1:2 (PGMA: GO). Electrochemical impedance spectroscopy and salt immersion experiments were performed to evaluate the corrosion resistance of the EP composite coatings. Comparing with pure EP and GO/EP coatings, the mechanical properties and anticorrosion properties of coatings were improved after adding PGMA@GO. When the addition amount of PGMA@GO (of 50 g EP) was 1.0 wt% and about 0.67 wt% GO was only needed, the PGMA@GO/EP composite coating possessed a high impedance of 5.68 × 108 Ω cm2 and a low breakpoint frequency of 0.39 Hz for 21-day immersion in 3.5 wt% NaCl solution. The anticorrosion mechanism of PGMA@GO/EP composite coating was also discussed. Note de contenu : - EXPERIMENTAL : Materials - Characterizations - Functionalization of graphene oxide - Preparation of PGMA@GO/EP composite coating
- RESULTS AND DISCUSSION : Structural properties of PGMA@GO - The optimal weight ratio of PGMA@GO - Characterization of PGMA@GO/EP and GO/EP composite coating - Anticorrosion performance of PGMA@GO/EP and GO/EP composite coating - Anticorrosion mechanism of PGMA@GO/EP composite coating
- Table 1 : Main recipes of the anticorrosion composite coatings
- Table 2 : Zeta potentials of GO, PGMA, CTAB, PGMA–CTAB, and PGMA@GO (1:2) in deionized water
- Table 3 : Low frequency impedance (|Z|0.01Hz) of EP, 1.0% PGMA/EP, 0.5% GO/EP, 1.0% GO/EP, 1.5% GO/EP, 2.0% GO/EP, 0.5% PGMA@GO/EP, 1.0% PGMA@GO/EP, 1.5% PGMA@GO/EP, and 2.0% PGMA@GO/EP composite coatings during different immersion times in 3.5 wt% NaCl solution
- Table 4 : Breakpoint frequency (fb) of the composite coatings with different additivesDOI : https://doi.org/10.1007/s11998-020-00409-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00409-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35602
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Code-barres Cote Support Localisation Section Disponibilité 22701 - Périodique Bibliothèque principale Documentaires Disponible Fabrication of inhibitor anion-intercalated layered double hydroxide host films on aluminum alloy 2024 and their anticorrosion properties / You Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 2 (03/2015)
[article]
Titre : Fabrication of inhibitor anion-intercalated layered double hydroxide host films on aluminum alloy 2024 and their anticorrosion properties Type de document : texte imprimé Auteurs : You Zhang, Auteur ; Jianhua Liu, Auteur ; Yingdong Li, Auteur ; SongMei Li, Auteur ; Mei Yu, Auteur ; Bing Xue, Auteur Année de publication : 2015 Article en page(s) : p. 293-302 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages
Anticorrosifs
Anticorrosion
Hydroxydes doubles lamellairesTags : 'Layered double hydroxide' Films 'Corrosion inhibitors' 'Aluminium alloy' Anticorrosion Index. décimale : 667.9 Revêtements et enduits Résumé : ZnAl layered double hydroxide (LDH) host films have been synthesized on aluminum alloy 2024 substrate via a facile crystallization method, and then intercalated with different corrosion inhibitor anions (vanadate, molybdate, and 2-mercaptobenzothiazolate). The structures, compositions, and morphologies of the as-synthesized films before and after the anion-exchange reaction were characterized by means of glancing-angle X-ray diffraction, Fourier transform infrared, X-ray photoelectron spectroscopy, and scanning electron microscope techniques. The anticorrosion performance of films was evaluated by potentiodynamic polarization and salt spray test. The results show that all inhibitor anions are successfully intercalated in the layered galleries, providing enhanced corrosion protection for the substrate alloy. The anticorrosion abilities of films loaded with inhibitor anions are ordered as LDH–VO3 > LDH–MBT > LDH–MoO4 > LDH–NO3. Note de contenu : EXPERIMENTAL : Materials - Synthesis of ZnAl-LDH films - Characterization
RESULTS AND DISCUSSION : Sructure and morphology of the LDH films - XPS analysis - Corrosion behavior of the LDH filmsDOI : 10.1007/s11998-014-9644-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9644-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23648
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Code-barres Cote Support Localisation Section Disponibilité 17119 - Périodique Bibliothèque principale Documentaires Disponible Fabrication of a nonionic self-emulsifiable waterborne epoxy curing agent with high cure properties / Xiaofeng Huang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
[article]
Titre : Fabrication of a nonionic self-emulsifiable waterborne epoxy curing agent with high cure properties Type de document : texte imprimé Auteurs : Xiaofeng Huang, Auteur ; Lei Wang, Auteur ; Yingbiao Lai, Auteur ; Laizhou Li, Auteur ; Xiang Jiang, Auteur Année de publication : 2021 Article en page(s) : p. 549-558 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Composés organiques -- Synthèse
Mesure
Revêtements -- Propriétés mécaniques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Waterborne epoxy curing agent plays a key part in the waterborne epoxy resin coatings, directly affecting the physical and chemical properties of the coating film. Here, we present triethylene tetramine (TETA), polypropylene glycol diglycidyl ether (PPGDGE), epoxy resin E20 and phenyl glycidyl ether (PGE) as reactants to fabricate a novel nonionic self-emulsifiable waterborne epoxy curing agent for oily epoxy resin through three steps of chain extension reaction, addition reaction, and capping reaction. The curing agent achieved excellent emulsifying and curing properties under the condition that TETA reacted with PPGDGE at 65°C for 4 h with the molar ratio of 2.2:1, 40% primary amine was added with E20 at 65°C for 3 h and 125% residual primary amine was capped with PGE at 65°C for 3 h. The as-prepared waterborne epoxy curing agent was characterized by Fourier transform-infrared spectroscopy and surface tension. The cured film of emulsified oily epoxy resin (E51) prepared by the as-prepared curing agent indirectly was characterized by scanning electron microscopy, thermogravimetric analysis and differential scanning calorimetry tests. The 2K waterborne epoxy coating film prepared by the as-prepared nonionic self-emulsifiable curing agent and E51 displayed better thermal property, surface appearance, flexibility, impact resistance, adhesion, and chemical corrosion resistance. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of self-emulsifiable epoxy curing agent - Emulsifying of oily epoxy resin - Measurement and characterization
- RESULTS AND DISCUSSION : Fabrication of self-emulsifiable waterborne epoxy curing agent - Properties of 2K waterborne epoxy coating film
- Scheme 1 : The three steps of chemical reaction for synthesis of the self-emulsifiable epoxy curing agent
- Table 1 : Influence of the molar ratio of TETA to PPGDGE on emulsifying and curing properties
- Table 2 : Influence of the molar ratio of E20 to the adduct on emulsifying and curing properties
- Table 3 : Influence of the molar ratio of PGE to the residual –NH2 group on emulsifying and curing properties
- Table 4 : Performance parameter of waterborne epoxy curing agent
- Table 5 : Comparison of mechanical properties and corrosion resistance between different epoxy resin filmsDOI : https://doi.org/10.1007/s11998-020-00423-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00423-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35614
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Code-barres Cote Support Localisation Section Disponibilité 22701 - Périodique Bibliothèque principale Documentaires Disponible Facile fabrication of superhydrophobic nanocomposites coating materials using nanoemulsion polymerization technique and its application for protecting the petroleum carbon steel pipelines / M. R. Noor El-Din in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
[article]
Titre : Facile fabrication of superhydrophobic nanocomposites coating materials using nanoemulsion polymerization technique and its application for protecting the petroleum carbon steel pipelines Type de document : texte imprimé Auteurs : M. R. Noor El-Din, Auteur ; A. I. Hashem, Auteur ; R. E. Morsi, Auteur ; A. Abd El-Azeim, Auteur ; Reham H. Mohamed, Auteur Année de publication : 2023 Article en page(s) : p. 291-305 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone
AcierL'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
Copolymère styrène acétate de vinyle
Dioxyde de silicium
Dip-coating
Fourier, Spectroscopie infrarouge à transformée de
Hydrophobie
Lumière -- Diffusion
Métaux -- Revêtements protecteurs
Nanoémulsions
Nanoparticules
Polymérisation en émulsion
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : This paper aims to fabricate new superhydrophobic nanocomposite coating materials to protect the inner surfaces of the petroleum pipelines from corrosion. The batch emulsification polymerization technique (BEM) was used as a facial eco-friendly technique to prepare three hydrophobic (styrene/vinyl acetate) copolymers. The sol–gel method was used to prepare SiO2 nanoparticles (SiO2-NPs) with average size ranging from 90 to 101 nm. The functionalized SiO2-NPs were prepared using hexadecyl trimethoxy silane (HDTS) as a precursor to increasing the hydrophobicity character of the unfunctionalized SiO2-NPs. Three superhydrophobic [(styrene/vinyl acetate copolymer/functionalized SiO2 nanoparticles (SiO2NPs)] nanocomposites denoted as M1, M3, and M5 were fabricated by incorporating 1, 3, and 5 wt% of the functionalized-SiO2NPs into the styrene/vinyl acetate copolymer, respectively. The effectiveness of the fabricated nanocomposite coating materials was analyzed using contact angle measurement and transmission electron and atomic force microscopies. The results showed that the highest contact angle of 161.21o was obtained by M5-nanocomposite. The highest corrosion efficiency of 99.63% was obtained at 300 ppm concentration of M5-nanocomposite-coated solution, 298 K, and 24 days. Note de contenu : - MATERIALS AND METHODS : Materials - Petroleum produced water - Methods
- RESULTS AND DISCUSSION : FTIR spectroscopy analysis of C3-copolymer - Dynamic light scattering (DLS) measurements - Preparation of unfunctionalized Si2O-NPs - Fabrication of superhydrophobic nanocomposites - Assessment of the coated coupons as anticorrosion material
- Table 1 : Contact angle (θ) measurements of uncoated and coated carbon steel with (C3-copolymer), (E-silicate), and (M1-, M2-, M3-composites) at different concentrations of E-silicate as (0), (3), and (1, 3, and 5) wt %, respectively
- Table 2 : Inhibition efficiency (η) and the corrosion rate of uncoated and coated coupons for C3-copolymer and M5-composite concentration of 100 ppm and (100, 200, and 300 ppm), respectively, 298 K, and 24 days
- Table 3 : Activation energy (Ea) of uncoated and coated carbon steel coupons with C3-copolymer and M5-composite at 0, 100, and 100 ppm, respectively, and different temperatures of 298, 313 and 333 KDOI : https://doi.org/10.1007/s11998-022-00669-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00669-z.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38843
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Code-barres Cote Support Localisation Section Disponibilité 23928 - Périodique Bibliothèque principale Documentaires Disponible Facile preparation of anticorrosive and decorative multifunctional coatings via the inclusion of pearlescent oxide-covered mica pigments / Walaa M. Abd El-Gawad in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
[article]
Titre : Facile preparation of anticorrosive and decorative multifunctional coatings via the inclusion of pearlescent oxide-covered mica pigments Type de document : texte imprimé Auteurs : Walaa M. Abd El-Gawad, Auteur ; Essam A. Mossalam, Auteur ; Mohamed M. Selim, Auteur Année de publication : 2023 Article en page(s) : p. 603-622 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Arrachement (matériaux)
Brillance (optique) -- Mesure
Caractérisation
Colorimétrie
Epoxydes
Evaluation
Formulation (Génie chimique)
Mica
Oxydes métalliques
Pigments nacrés
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements décoratifs
Revêtements décoratifs:Peinture décorative
Revêtements organiques
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : The keynote of this work was to prepare cost-saving intensely colored pearlescent pigments with anticorrosive properties via deposition of a low ratio of expensive mixed oxides on mica to be applied in decorative and anticorrosive multifunctional coatings. Herein, a mixture of CeO2 and Fe2O3 was precipitated on mica to prepare anticorrosive pigment with golden color, while brilliant intensive orange pigment was prepared via the deposition of ZrO2.Fe2O3 mix on mica. The prepared pearlescent pigments based on mica flakes covered with CeO2.Fe2O3 and ZrO2.Fe2O3 were characterized using scanning electron microscopy, energy-dispersive X-ray analysis, X-ray fluorescence, and thermal gravimetric analysis. The mixed oxide-covered mica pigments (Ce-Fe@M and Zr-Fe@M) were applied in two paint formulations in addition to one formulation containing mica for comparison. The color of the resulting coatings was investigated utilizing the CIELab technique. Additionally, the inhibitive properties of the coatings were determined using potentiodynamic anodic polarization, open circuit voltage, linear polarization resistivity, and electrochemical impedance spectroscopy techniques. The results declared that the color of the coating containing CeO2.Fe2O3@M is gold and that of ZrO2.Fe2O3/M is brilliant orange. Moreover, the results deduced that the resistance of coating containing Ce-Fe@M ranged between (5061–4887 Ω) and that containing Zr-Fe@M is from 6846 to 3290 Ω, while coating based on mica is the least. These results revealed that the present study has succeeded in offering both anticorrosive and decorative functions in a single-layered coat. Note de contenu : - EXPERIMENTAL : Materials - Characterization of the prepared pigments - Application in coatings - Methods of testing and evaluation of coating
- RESULTS AND DISCUSSION : Pigments characterization - FTIR - Coatings morphology - Corrosion results - Color and gloss measurements - Mechanical properties of the coatings - Pull-off strength results
- Table 1 : The paint formulations
- Table 2 : XRF analysis of mica, Ce-Fe@M, and Zr-Fe@M
- Table 3 : Corrosion resistance of the coatings containing mica, Ce-Fe@M, and Zr-Fe@M
- Table 4 : Electrochemical measurements results obtained from potentiodynamicanodic polarization and OCV technique
- Table 5 : EIS data of the coatings containing mica, Ce-Fe@M, and Zr-Fe@MTable 6 Color and gloss results of coatings containing mica, Ce-Fe@M, and Zr-Fe@MDOI : https://doi.org/10.1007/s11998-022-00693-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00693-z.pdf?pdf=button Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39306
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