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Review of crater in cathodic electrodeposition coating and their different cause / Akshay A. Masule in PAINTINDIA, Vol. LXXI, N° 10 (10/2021)
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Titre : Review of crater in cathodic electrodeposition coating and their different cause Type de document : texte imprimé Auteurs : Akshay A. Masule, Auteur Année de publication : 2021 Article en page(s) : p. 63-70 Note générale : Bibliogr. Langues : Anglais (eng) 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.
Automobiles -- Revêtements:Automobiles -- Peinture
Cratère (défaut)
Dépôt électrolytique
Métaux -- Revêtements
Primaire (revêtement)
Revêtements -- Analyse
Revêtements -- Défauts:Peinture -- Défauts
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Cationic electrodeposition primers have been widely adopted by automobile companies due to their advantages with regard to application and corrosion resistance Cationic electrodeposition primers, on the other hand, can leave craters on precoated steel sheets under certain conditions. Asa result, it's critical to figure out the actual mechanism of cratering from the perspective of cratering control.
Resistance-time profiles generated using recorded current and voltage at the early step of electrodeposition were explored in this study employing digitised measurements to record data on mil lisecond time scales. The findings show that during electrocoating, a violent hydrogen gas is created locally, causing the electrodeposited paint film to burst, and defect left in the deposited layer following electrodeposition produce cratering when the paint film has dried.
The authors looked into the following aspects to better understand the cratering mechanism in cationic electrodeposition coating : the current of electrodeposition, the structure and characteristics of the crater, and the deposition and curing of paint.Note de contenu : - EXPERIMENTAL : Steel sheet specimens - Materials - Cationic electro paints - Electrode-position coating method
- RESULTS : Conditions for crater formation - Hydrogen evolution mechanism and oxygen absorption mechanism - Evolution of hydrogen - Energization requirements
- RESULTS AND CONSIDERATION : Infrared spectrographic analysis (IR) - Gel permeation chromatography (GPC) - Behaviour of the paint during baking
- DISCUSSION : Cratering process - Measures to prevent crateringEn ligne : https://drive.google.com/file/d/1bb2kiv9tgIndyfTCBLcBRhYUmhnn21zy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36880
in PAINTINDIA > Vol. LXXI, N° 10 (10/2021) . - p. 63-70[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23037 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : A review of different smart coatings Type de document : texte imprimé Auteurs : Mohit Katiyar, Auteur ; Durgesh K. Soni, Auteur ; Arun Maithani, Auteur Année de publication : 2021 Article en page(s) : p. 70-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Conducteurs organiques
Matériaux intelligents
Nanoparticules
Peinture solaire
Pigments
Propriétés anti-empreintes
Revêtement antireflet
Revêtement auto-nettoyant
Revêtement autoréparant
Revêtement conducteur
Revêtements antisalissures
Revêtements organiques
ThermochromieIndex. décimale : 667.9 Revêtements et enduits Résumé : Today's coatings are becoming smarter day by day. They hold answers to some of unmet demands in different markets like automotive, industrial, marine, aerospace etc. And, it's really well sustained by intense growth of smart additives and new preparation methods. Smart Coatings are coatings, but with predefined properties and special films, which make them sense and respond to environment and other externat stimuli. Smart coatings are made of programmable materials with a variety of physical, chemical, electrical and mechanical properties. These materials can changes in light, pressure, chemical, heat along with other stimuli. Several smart coating systems have already been developed and examined, as a result they are currently under investigation by numerous laboratories and industries across the world. Examples of smart coatings include stimuli responsive, antimicrobial, antifouling, conductive, self-healing, and super hydrophobic systems. Note de contenu : - Self-cleaning coating
- Anti-reflection coating
- Anti-fouling coating
- Anti-corrosive coating
- Thermochromic coatings
- Anti-fingerprint coating
- Self-healing paint : Autonomous healing mechanisms-based on corrosion inhibitors - Non-autonomous healing mechanisms-based on dynamic bonds
- Electrical conductive paint
- Solar paint
- Fig. 1 : Surface of a lotus leaf has a hierarchically rough structure
- Fig. 2 : Liquid dros and uneven surface of lotus leaf
- Fig. 3 : Scanning electron micrograph of lotus leaf. Schematic depicting the relationship between surface roughness and self-cleaning
- Fig. 4 : Reflection and transmission of light rays
- Fig. 5 : Examples of heavily fouled hulls
- Fig. 6 : A multilayer structure of thermochromic coating
- Fig. 7 : The coating becomes white, when is temperature reaches above the criticle temperature
- Fig. 8 : DA reaction of TFAT ; SEM image of the coating showing thermally activated self-healing behaviorEn ligne : https://drive.google.com/file/d/1osla2mOTQvfZ2PXhAIsA5sm_j-7t_fZu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36465
in PAINTINDIA > Vol. LXXI, N° 8 (08/2021) . - p. 70-80[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22922 - Périodique Bibliothèque principale Documentaires Disponible A review of effects of hyperbranched polymeric additive on properties of cured epoxy products / Vinayak Anant Bhanu in PAINTINDIA, Vol. LXXI, N° 7 (07/2021)
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Titre : A review of effects of hyperbranched polymeric additive on properties of cured epoxy products Type de document : texte imprimé Auteurs : Vinayak Anant Bhanu, Auteur ; Sunil Narsingrao Garaje, Auteur ; Shashikant Sangameshwar Paymalle, Auteur ; Singubiru Machindra Khatake, Auteur ; Yogaraj Umesh Nabar, Auteur ; James Herbison, Auteur ; Christian Przybyla, Auteur Année de publication : 2021 Article en page(s) : p. 55-69 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie -- Essais et réactifs
Epoxydes
Nanoparticules
Polymères ramifiés
Ressources renouvelables
Réticulants
Revêtements -- Additifs
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : There has been continuous interest in developing epoxy-based products having superior properties. Hyperbranched polymer (HBP) is one of the valuable additives for making such materials. It is a unique additive in the sense it provides simultaneous improvement in many properties of wide range of epoxy products like composites, coatings, and adhesives. This paper reviews the recent literature on epoxy materials made using HBP additives. In addition, we have briefly discussed our recent work on the development of epoxy systems using two new am ino functional hyperbranched phenalkamine curing agents that use cardanol. As an additive, presence of reactive as well as nonreactive types of HBP in the epoxy have an impact that covers different aspects like improvement in various properties, morphology of cured products and influence on the kinetics of curing reaction. Nanofiller containing HBP in epoxy composites and coatings are found to provide excellent properties at lower nanofiller content than composites of micron sized conventional fillers in the absence of HBP. Such composites and some more ideas for future development are discussed in this review. Note de contenu : - SYNTHESIS AND CLASSIFICATION OF HBP
- EPOXY SYSTEMS CONTAINING NONREACTIVE HBP : - Polyester and polyether HBP with hydroxyl or thiol end groups - Ester end group containing polyester polyols - Miscellaneous nonreactive HBP derivatives - ENC containing nonreactive HBP
- EPOXY SYSTEMS CONTAINING REACTIVE HBP : Epoxy functional reactive HBP - Epoxy functionalized HBP in ENC
- HBP CURING AGENTS CONTAINING EPOXY SYSTEMS : Amine functional reactive HBP - Hydroxyl, thiol, and acid functional reactive HBP - HBP ionic liquid hardeners - HBP curing agents in combination with nanofillers for ENC
- COMMENTS ON ROLES OF HBP IN EPOXY CURING AND CORRESPONDING
- Table 1 : Characteristics of different HBP backbones used in epoxy composites
- Table 2 : Effect of nonreactive HBP on epoxy composite on tangent Ô, Impact strength and Tg
- Table 3 : Advantages of using HBP modified nanofiller containing composites
- Table 4 : Composite properties for various systems containing epoxy functional HBP
- Table 5 : Effect of amine and other curing agents modified HBP on Composite propertiesEn ligne : https://drive.google.com/file/d/1_yB2q7zt6xg1wXG-7LLePOogz2Q1t9io/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36307
in PAINTINDIA > Vol. LXXI, N° 7 (07/2021) . - p. 55-69[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22921 - Périodique Bibliothèque principale Documentaires Disponible A review of high-quality epoxy resins for corrosion-resistant applications / Shams Anwar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
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Titre : A review of high-quality epoxy resins for corrosion-resistant applications Type de document : texte imprimé Auteurs : Shams Anwar, Auteur ; Xianguo Li, Auteur Année de publication : 2024 Article en page(s) : p. 461-480 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Chimie analytique
Composites à fibres de carbone
Copolymère phénolique époxy
Copolymère urushiol formaldéhyde
Electrochimie
Oxyde de graphène
Revêtements -- Détérioration
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Corrosion is a significant challenge in many practical applications, leading to the deterioration of metal infrastructure and equipment. A literature review indicates that various epoxy resins (ERs) and epoxy phenolic resins (EPRs) based coatings are available and are effectively applied on steel and aluminum surfaces for protection against a corrosive environment. The corrosion-resistant performance of ERs and EPRs can be further improved by incorporating numerous chemical compounds through improved bonding, such as inorganic compounds and carbon-based materials, e.g., zinc oxide (ZnO), titanium dioxide (TiO2), silicon dioxide (SiO2), carbon fiber, carbon nanotube (CNTs) and graphene oxide (GO). Surface heterogeneity (surface pores) of coatings contributes to reduced corrosion protection as corrosion species can diffuse to these inconsistencies and break the coating structure of the organic coating. However, after over a hundred years of research and development, the degradation/failure mechanism of organic coatings is still under study. This paper provides an overview of the current state-of-the-art knowledge of the numerous protective organic coatings and coating approaches and examines coating performance and mechanism for the coating degradation and failure in a corrosive environment. Finally, a summary is presented on the understanding of the mechanisms and challenges associated with, and critical factors influencing, coating durability and predictive formulation against coating damage. Note de contenu : - DEGRADATION MECHANISM OF ORGANIC COATINGS : Ionic migration - Conduction route development
FUNDAMENTAL OF EPOXY RESINS (ERS) : Bisphenol ERs - Cycloaliphatic ERs - Novolac ERs - Trifunctional and tetrafunctional ERs - Halogenated ERs
- Fundamentals of epoxy phenolic resins (EPRs)
- EPOXY-BASED POLYMER COMPOSITES : Inorganic polymer composites - Thermoplastic polymer composites - Carbon fiber composites - Carbon nanotube composites - Graphene oxide (GO) with urushiol-formaldehyde composites
- CORROSION-RESISTANT EPOXY RESIN COATINGS
- FUTURE RESEARCH AND RECOMMENDATIONSDOI : https://doi.org/10.1007/s11998-023-00865-5 En ligne : https://drive.google.com/file/d/1UZvCznuLdXEbcwwUikB0OJiVBulmBaw2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40770
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 461-480[article]A review of microencapsulated thermochromic coatings for sustainable building applications / Pritish Shivanand Aklujkar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
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Titre : A review of microencapsulated thermochromic coatings for sustainable building applications Type de document : texte imprimé Auteurs : Pritish Shivanand Aklujkar, Auteur ; Balasubramanian Kandasubramanian, Auteur Année de publication : 2021 Article en page(s) : p. 19-37 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colorants
Construction -- Matériaux
Développement durable
Encapsulation
Polymérisation interfaciale
Revêtements organiques
ThermochromieIndex. décimale : 667.9 Revêtements et enduits Résumé : The review covers microencapsulation methods for encapsulating thermochromic leuco dyes, and the incorporation of these microencapsulated thermochromic dyes in smart coatings has been developed, which helps in creating sustainable buildings that use less power for heating and cooling applications. The thermochromic mechanism of leuco dye developer–solvent systems has been elaborated, and the role of each component for the functioning of thermochromic dyes is discussed. The future scope of these dyes in applications involving smart windows and smart coatings for sustainable buildings is consolidated, and their impact on energy consumption has been studied. Note de contenu : - THERMOCHROMIC LEUCO DYE : COMPOSITION AND MECHANISM : Composition of the thermochromic system - Mechanism of thermochromic dyes
- MICROENCAPSULATION OF THE THERMOCHROMIC LEUCO DYES : Interfacial polymerization - Coacervation - Microencapsulating thermochromic dyes with microPCMs
- THERMOCHROMIC COATINGS : APPLICATIONS IN CONSTRUCTION : Thermochromic coating formulation
- THERMOCHROMIC SMART WINDOW
- Table 1 : Classification of significant types of chromism
- Table 2 : Division of the thermochromic systems based on inherent and doped systemsDOI : https://doi.org/10.1007/s11998-020-00396-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00396-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35348
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 19-37[article]Réservation
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