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Corrosion mitigation of carbon steel in acidic and salty solutions using electrophoretically deposited graphene coatings / Asmaa R. Heiba in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
[article]
Titre : Corrosion mitigation of carbon steel in acidic and salty solutions using electrophoretically deposited graphene coatings Type de document : texte imprimé Auteurs : Asmaa R. Heiba, Auteur ; Fatma A. Taher, Auteur ; Rabab M. Abou Shahba, Auteur ; Nabil A. Abdel Ghany, Auteur Année de publication : 2021 Article en page(s) : p. 501-510 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone
Anticorrosion
Caractérisation
Dépôt électrophorétique
Métaux -- Revêtements protecteurs
Oxyde de graphèneIndex. décimale : 667.9 Revêtements et enduits Résumé : In the modern metal finishing industry, corrosion protection plays a critical role, with many coatings created to prevent this phenomenon (corrosion) and protect the metals. Nano-coating has of late been used to develop corrosion-resistant metal composites. Recently, layers of graphene-based materials with extraordinary properties have been successfully manufactured and applied through electrophoretic deposition (EPD). This article summarizes work altering the graphene oxide (GO) content, which was prepared using an adapted Hummers' method and then the simultaneous reduction of the GO suspension by the EPD method into graphene nano-coating on carbon steel. Different parameters were optimized, namely applied voltage, deposition time, and GO concentration. Scanning electron microscopy and X-ray diffraction were used to characterize the coatings. The corrosion resistance of these coatings was measured by electrochemical polarization in aqueous solutions under accelerated corrosion conditions. The results show not only that EPD is a simple technique that allows creating a graphene coat on carbon steel from GO suspension, but also that it forms a graphene nano-coating which provides significant protection against corrosion of steel in acidic and salty solutions. Note de contenu : - EXPERIMENTAL : Materials and solutions - Synthesis of GO - Electrophoretic deposition (EPD) of GO - Electrochemical corrosion test - Characterizations
- RESULTS AND DISCUSSION : Characterization of synthesized GO - Electrophoretic deposition parameters
- CORROSION STUDIES : Weight loss technique - Potentiodynamic polarization technique - Surface examination by scanning electron microscopy (SEM)
- Table 1 : The chemical composition of carbon steel electrode used for the present study
- Table 2 : Corrosion parameters obtained from potentiodynamic polarization of uncoated and coated C-steel electrodes at different conditions at 25°CDOI : https://doi.org/10.1007/s11998-020-00419-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00419-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35610
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Code-barres Cote Support Localisation Section Disponibilité 22701 - Périodique Bibliothèque principale Documentaires Disponible Corrosion protection of benzoxazine and cardanol-doped polyaniline coatings / Raiane Valenti Gonçalves in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
[article]
Titre : Corrosion protection of benzoxazine and cardanol-doped polyaniline coatings Type de document : texte imprimé Auteurs : Raiane Valenti Gonçalves, Auteur ; Isadora Quinhones Liposki, Auteur ; Lucas Weber Dias, Auteur ; Alessandra Fiorini Baldissera, Auteur ; Mauro Ricardo da Silva Silveira, Auteur ; Carlos Arthur Ferreira, Auteur ; Leila Bonnaud, Auteur ; Nara Regina de Souza Basso, Auteur Année de publication : 2022 Article en page(s) : p. 575-586 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Benzoxazine
Caractérisation
Cardanol
Essais d'adhésion
Formulation (Génie chimique)
Polyacrylonitrile
Polymères -- Synthèse
Revêtements organiques
Revêtements protecteurs
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In this work a corrosion protection material formed by commercial benzoxazine and polyaniline (PAni) for coatings applications was developed. PAni doped with a natural phenolic compound, cardanol, was used in the coating preparation, and conventional hydrochloric acid-doped PAni was also used for comparative purposes. Cardanol is a reddish-brown liquid obtained from the by-product of cashew nut processing. The presence of the aliphatic group and the hydroxyl of the cardanol, as well as the amine groups of the PAni, can enhance the corrosion barrier of a benzoxazine coatings. The anticorrosive properties of the coatings were evaluated by electrochemical impedance spectroscopy in 3.5% NaCl solution for a total period of 168 h. The coatings of benzoxazine filled with PAni showed better anticorrosion performance and adhesion strength on carbon steel substrate when compared to pristine benzoxazine and PAni doped with 3 wt% cardanol exhibits the best performances. This last result can be explained by both the presence of PAni and the better PAni dispersion within benzoxazine when doped with cardanol. In addition, the incorporation of cardanol-doped PAni in the benzoxazine reduced the cure temperature of the benzoxazine. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of cardanol-doped polyaniline - Benzoxazine/PAni coatings preparation - Characterization
- RESULTS AND DISCUSSION : Benzoxazine/Jeffamine® ED 600 curing systems - Benzoxazine/PAni coatings characterizations - Anticorrosive performance of benzoxazine/PAni coatings - Adhesion strength test
- Table 1 Formulation of benzoxazine /PAni coatings
- Table 2 Data of TGA curves of pure Bz and Bz
- Table 3 Data of DSC associated with curing process of benzoxazines coatings
- Table 4 Coating’s values of average thickness and adhesion strengthDOI : https://doi.org/10.1007/s11998-021-00545-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00545-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37288
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Code-barres Cote Support Localisation Section Disponibilité 23408 - Périodique Bibliothèque principale Documentaires Disponible Corrosion resistance of functionalized carbon nanotubes enhanced epoxy coatings on sintered NdFeB magnets / Hongyi yang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
[article]
Titre : Corrosion resistance of functionalized carbon nanotubes enhanced epoxy coatings on sintered NdFeB magnets Type de document : texte imprimé Auteurs : Hongyi yang, Auteur ; Liangsong Duan, Auteur ; Pengjie Zhang, Auteur ; Guangqing Xu, Auteur ; Jiewu Cui, Auteur ; Jun Lv, Auteur ; Wei Sun, Auteur ; Bingshan Li, Auteur ; Dongmei Wang, Auteur ; Yucheng Wu, Auteur Année de publication : 2022 Article en page(s) : p. 1317-1329 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Composites à fibres de carbone
Epoxydes
Essais de résilience
Matériaux -- Propriétés fonctionnelles
Nanotubes de carbone à parois multiplesUn nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets :
- le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ;
- le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier.
Revêtements organiques
Surfaces fonctionnelles
TaninsIndex. décimale : 667.9 Revêtements et enduits Résumé : In this work, tannic acid (TA) was employed to modify the surface of multiwall carbon nanotubes (CNTs) to form TCNTs hybrids via noncovalent functionalization to enhance its dispersibility in water. Then, the TCNTs enhanced epoxy coatings were applied on sintered NdFeB magnets by cathodic electrophoretic deposition method for corrosion test. The corrosion resistance of prepared specimens was assessed by electrochemical experiments. The results show that TCNTs hybrids present a more homogeneous distribution in epoxy resin than pristine CNTs and could obviously promote anticorrosion properties of prepared specimens. Within 36-day soaking in 3.5 wt.% NaCl solution, the specimens maintain a high value of |Z|0.01Hz (108 Ω cm2) when the concentration of TCNTs is 2 g/L. When immersed in 3.5 wt.% NaCl solution for 40 days, the Ecorr of specimens shifts to − 0.207 V and Jcorr is about 5.281 × 10−11 A cm−2, which demonstrates superior corrosion resistance. Note de contenu : - EXPERIMENT : Materials - Experimental method - Material characterization and corrosion resistance test
- RESULTS AND DISCUSSION : Characterization of TCNTs hybrids - Characterization of specimens - Corrosion protection mechanism
- Table 1 : Surface chemical composition of CNTs and TCNTs hybrids
- Table 2 : |Z|0.01Hz of specimens after being immersed in 3.5 wt.% NaCl solution for different times
- Table 3 : Electrochemical polarization parameters of different specimens
- Table 4 : Comparation of corrosion protection data of chemical oxidized CNTs enhanced epoxy coatings with this workDOI : https://doi.org/10.1007/s11998-022-00641-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-006241-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38272
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Code-barres Cote Support Localisation Section Disponibilité 23672 - Périodique Bibliothèque principale Documentaires Disponible Corrosion resistance of HF-treated Mg alloy stent following balloon expansion and its improvement through biodegradable polymer coating / Xu Wei in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)
[article]
Titre : Corrosion resistance of HF-treated Mg alloy stent following balloon expansion and its improvement through biodegradable polymer coating Type de document : texte imprimé Auteurs : Xu Wei, Auteur ; Kensuke Sato, Auteur ; Yuki Koga, Auteur ; Makoto Sasaki, Auteur ; Takuro Niidoma, Auteur Année de publication : 2020 Article en page(s) : p. 1023-1032 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acide hydrofluorique
Anticorrosion
Caractérisation
Cellules -- Adhésivité
Implants médicaux
Implants résorbables
Magnésium -- Alliages
Polylactique, AcideL'acide polylactique (anglais : polylactic acid, abrégé en PLA) est un polymère entièrement biodégradable utilisé dans l'alimentation pour l'emballage des œufs et plus récemment pour remplacer les sacs et cabas en plastiques jusqu'ici distribués dans les commerces. Il est utilisé également en chirurgie où les sutures sont réalisées avec des polymères biodégradables qui sont décomposés par réaction avec l’eau ou sous l’action d’enzymes. Il est également utilisé pour les nouveaux essais de stent biodégradable.
Le PLA peut-être obtenu à partir d'amidon de maïs, ce qui en fait la première alternative naturelle au polyéthylène (le terme de bioplastique est utilisé). En effet, l'acide polylactique est un produit résultant de la fermentation des sucres ou de l'amidon sous l'effet de bactéries synthétisant l'acide lactique. Dans un second temps, l'acide lactique est polymérisé par un nouveau procédé de fermentation, pour devenir de l'acide polylactique.
Ce procédé conduit à des polymères avec des masses molaires relativement basses. Afin de produire un acide polylactique avec des masses molaires plus élevées, l'acide polylactique produit par condensation de l'acide lactique est dépolymérisé, produisant du lactide, qui est à son tour polymérisé par ouverture de cycle.
Le PLA est donc l’un de ces polymères, dans lequel les longues molécules filiformes sont construites par la réaction d’un groupement acide et d’une molécule d’acide lactique sur le groupement hydroxyle d’une autre pour donner une jonction ester. Dans le corps, la réaction se fait en sens inverse et l’acide lactique ainsi libéré est incorporé dans le processus métabolique normal. On obtient un polymère plus résistant en utilisant l'acide glycolique, soit seul, soit combiné à l’acide lactique.
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Magnesium (Mg) alloy has been actively investigated as a bioresorbable scaffold (BRS) for use as a next-generation stent because of its appropriate mechanical properties and biocompatibility. However, Mg alloy quickly degrades in the physiological environment. Hydrofluoric acid (HF) treatment and surface coating with biodegradable polymer are approaches for enhancing the corrosion resistance of Mg alloy. However, there are no studies that focus on the corrosion behavior of the Mg alloy stent after balloon catheter expansion, which results in mechanical stress and is required for stent placement. In this study, the corrosion behavior of a Mg alloy stent after expansion by a balloon catheter was investigated. Compared with the bare Mg alloy stent, the HF-treated Mg alloy stent showed excellent corrosion resistance without expansion. However, balloon catheter expansion caused small fragments and cracks to appear on the surface of the HF-treated Mg alloy stent and accelerated its corrosion rate. The HF-treated Mg alloy stent was therefore further coated with poly(d,l-lactic acid) (PDLLA). As a result, the high corrosion resistance of the coated stent was maintained after its expansion along with higher biocompatibility for endothelial cell adhesion than the stent without the polymer coating. The HF-treated and PDLLA-coated platform is expected to be a BRS candidate for clinical applications. Note de contenu : - EXPERIMENTAL : Materials - Stent HF treatment and biodegradable polymer coating - Surface - Characterization - Contraction and expansion of the stent - Evaluation of corrosion - Cell adhesion
- RESULTS AND DISCUSSION : Physicochemical characteristics of HF-treated Mg alloy stents - Corrosion behavior of the HF-treated Mf alloy stents with and without expansion - Polymer coating of HF-treated Mf alloy stents - HUVEC adhesion on the PDLLA-coated Mg alloyDOI : https://doi.org/10.1007/s11998-019-00284-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00284-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34389
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Code-barres Cote Support Localisation Section Disponibilité 21864 - Périodique Bibliothèque principale Documentaires Disponible Corrosion resistance of a self-curing waterborne epoxy resin coating / Gongwen Tang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)
[article]
Titre : Corrosion resistance of a self-curing waterborne epoxy resin coating Type de document : texte imprimé Auteurs : Gongwen Tang, Auteur ; Ting Ting Ren, Auteur ; Zhishan Yan, Auteur ; Linrong Ma, Auteur ; Xianhui Pan, Auteur ; Xiangyu Hou, Auteur ; Xin Huang, Auteur Année de publication : 2019 Article en page(s) : p. 895-904 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Auto-réticulation
Caractérisation
Diisopropoxyde bisacétylacétonate de titane
Epoxydes
Résistance chimique
Revêtements -- Propriétés physiques
Revêtements -- Propriétés thermiques
Revêtements organiques
Revêtements protecteurs
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Waterborne coatings have gained more and more attention as a method to protect the environment. However, the application of waterborne coatings to metals, especially for sufficient long-term protection in harshly corrosive environments, is still limited. Here, we report a self-curing waterborne coating with good corrosion resistance. First, a self-curing waterborne epoxy resin (SWEP) was synthesized by a chemical reaction between the epoxy resin and titanium diisopropoxide bisacetylacetonate in water. The structural characterizations via Fourier transform infrared spectroscopy and 13C nuclear magnetic resonance spectrsocopy confirmed the successful preparation of the SWEP resin. Differential scanning calorimetry and thermogravimetric analysis showed that the SWEP resin could be cured by heating without the use of any curing agents, and the cured coating exhibited good thermal resistance. The mechanical properties of the cured coatings were discussed in the context of the corresponding standards. The results confirmed that the physical properties of the SWEP coating were as good as those of a traditional two-component waterborne epoxy resin (DCWEP) coating. The chemical resistance analysis revealed that the water, acid and alkaline resistances of the SWEP coating all have significant improvements compared to those of the DCWEP coating. The electrochemical impedance spectroscopy and potentiodynamic polarization test implied that the SWEP coating provided better corrosion protection for metal substances than the DCWEP coating. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of the self-curing waterborne epoxy resin - Preparation of SWEP coatings - Characterization
- RESULTS AND DISCUSSION : Synthesis of the SWEP coating - Thermal properties - Physical properties - Chemical resistance - Electrochemical impedance spectroscopy (EIS)DOI : 10.1007/s11998-018-00166-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00166-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32600
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Code-barres Cote Support Localisation Section Disponibilité 20953 - Périodique Bibliothèque principale Documentaires Disponible Corrosion-resistant super-amphiphobic (PVDF-fnAl2O3) coating with thermal and mechanical stability / Nadiah Ghazali in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
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