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High modulus structural body shop adhesives / Felix Koch in ADHESION - ADHESIVES + SEALANTS, Vol. 15, N° 2/2018 (2018)
[article]
Titre : High modulus structural body shop adhesives Type de document : texte imprimé Auteurs : Felix Koch, Auteur ; Andreas Lutz, Auteur Année de publication : 2018 Article en page(s) : p. 17-19 Langues : Multilingue (mul) 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.
Adhésifs -- Propriétés mécaniques
Adhésifs dans les automobiles
Adhésifs structuraux
Essais accélérés (technologie)
Essais dynamiques
Métaux -- Collage
Résistance au décollement
Stabilité au stockageIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Since about twenty years structural adhesives are used in the body shop of an automotive line to bond vehicle body structures. The recent development of new toughening components allows to formulate structural adhesive which combine a high modulus but still offer excellent impact strength values. The increased adhesive modulus results in an overall improvement of the mechanical adhesive performance. Note de contenu : - Fig. 1 : Different steel grades for cold and warm forming in dependence of stress and strain
- Fig. 2 : Schematic view of the working principle of toughening polymers in an epoxy matrix after curing
- Fig. 3 : General overwiew of the adhesives' stiffnes represented by elastic modulus over impact peel strength for the different adhesive grades such as stiffening, semi-crash and crash resistant structural adhesives. The property space opened by the BETAMATE-technology is highlighted in yellow
- Fig. 4 : Comparison of e-modulus and impact peel strength of the new high modulus BETAMATE-technology in comparison with the reference technology - measured on DX 56+Z100 (0.75) and HC 420+Z100 (1.0 mm)
- Fig. 5 : Lap shear strength over elongation at break and fatigue resistance of the new high modulus BETAMATE-technology in comparison with the reference technology
- Fig. 6 : Artificial aging resistance of the new high modulus BETAMATE-technology in a VDA 233-102 test. Lap shear strengh on electro- and hot dip galvanized steel over 6 and 12 weeks and respective failure mode after 12 weeks artificial aging
- Fig. 7 : Storage stability of the new BETAMATE-Adhesives at room temperature and 30°C over a time of 40 weeks
- Table : Comparison of impact peel strength, modulus and glass transition temperature of older adhesive grades. Impact peel strength tested on DC04 steel ; 0.8 mm thick
En ligne : https://drive.google.com/file/d/1HmUewflcjWAwf_vfzf7BZtO7m2xhWEHM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30728
in ADHESION - ADHESIVES + SEALANTS > Vol. 15, N° 2/2018 (2018) . - p. 17-19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20007 - Périodique Bibliothèque principale Documentaires Disponible A holistic perspective of coatings technology / Charles R. Hegedus in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 1 (01/2004)
[article]
Titre : A holistic perspective of coatings technology Type de document : texte imprimé Auteurs : Charles R. Hegedus, Auteur Année de publication : 2004 Article en page(s) : p. 5-19 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Durée de vie (Ingénierie)
Essais accélérés (technologie)
Revêtements organiques
Revêtements protecteurs
Surfaces -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : Organic coatings are functional materials, working substances. They are used in a wide variety of applications for a great number of reasons. Many of the functions that coatings provide meet essential societal needs. Their advancement has been and will continue to be important to the advancement of technology and society. Holism is the concept that whole entities have an existence other than the mere sum of their parts and that a broader perspective will yield better under-standing and results. A coating is not just a polymer or pigments; a coating system is not just a primer and topcoat acting independently; an end product (i.e., the product to be coated) would not be as valuable without a properly functioning coating system. A coating is a complex material that is often a component of a coating system, which inturn provides added value to a final product. Coatings technology spans a wide spectrum, from the complex interactions and effects of individual paint ingredients, to the design of coating systems to perform specific functions, to the design and manufacture of end products. The focus of this paper is to suggest a holistic perspective of coatings technology, to illustrate that diversity of knowledge, thought, and approach in designing these coatings, coating systems, and final products will yield better science, better coatings and better final products. DOI : 10.1007/s11998-004-0020-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-004-0020-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3928
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 1, N° 1 (01/2004) . - p. 5-19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000585 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : How durable are biopolymers ? : Researching the long-term durability of bioplastics Type de document : texte imprimé Auteurs : Hans-Peter Heim, Auteur ; Victoria Goetjes, Auteur ; Celia Falkenreck, Auteur ; Samantha Pfanzer, Auteur Année de publication : 2023 Article en page(s) : p. 90-93 Langues : Anglais (eng) Catégories : Biopolymères
Biopolymères -- Détérioration
Durée de vie (Ingénierie)
Essais accélérés (technologie)
Essais dynamiques
Résistance à la traction
Résistance des matériauxIndex. décimale : 668.4 Plastiques, vinyles Résumé : To increase the currently limited use of bioplastics and biocomposites in durable products, sufficient information on their long-term durability must be generated. As part of the BeBio2 project, the University of Kassel, Germany, is working with a group of institutes and more than 50 industrial partners to create a database. With property analyses for consumer and industrial products, it aims to ensure transparency – and increase acceptance in plastics processing. Note de contenu : - Database consolidates information on long-term use
- Research in cooperation with industry
- Changes in tensile strength due to external weather conditions
- Artificial weathering versus natural weathering
- Fig. 1 : Structure of the BeBio2 research network
- Fig. 2 : Flow chart of the twelve subprojects in BeBio2
- Fig. 3 : Tensile strength of various aged bioplastics and biocomposites
- Fig. 4 : Weathered (top) and unweathered (bottom) test specimen of 30 wt. % reinforced PA10.10
- Fig. 5 : Artificial weathering cycle consisting of 14 summer and 14 winter cyclesEn ligne : https://drive.google.com/file/d/1qmIIj9WEAqLrP8xQQQqPXZrDGB_OK9Ph/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40565
in PLASTICS INSIGHTS > Vol. 113, N° 8 (2023) . - p. 90-93[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24338 - Périodique Bibliothèque principale Documentaires Disponible Hubble bubble rising / Vijay Datta in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 12 (12/2017)
[article]
Titre : Hubble bubble rising : A new beginning, the better way Type de document : texte imprimé Auteurs : Vijay Datta, Auteur ; Carl Reed, Auteur ; Mike O'Donoghue, Auteur Année de publication : 2018 Article en page(s) : p. 26-35 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité)
Anticorrosion
Cloquage (défauts)
Délaminage
Essais (technologie)
Essais accélérés (technologie)
Essais d'adhésion
Essais de résilience
Revêtements protecteurs
Spécifications
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : This article examines the flaws of the current system of establishing and using specifications and testing. Because these flaws are so odious, a “better way” will be proposed in order to provide the end user real value in the use of protective coatings. Three tests will be discussed as illustrative examples of the flaws in the current system of using specifications and testing. These three tests are accelerated corrosion testing, pull-off adhesion testing, and constant stress, chemical immersion testing. Notwithstanding, this monograph will show how these tests, as examples of testing in general, can be used in a manner that provides the end user real value. Note de contenu : - It all begins with the specification : Conventional wisdom specifications - Hand-me-down specifications - Common-use specifications
- Relevance : Either you have it or you don't
- Through all the arbitrary rationale
- Test data and the law of unintended consequences
- WAC-KY expectations, WAC-KY testing, WAC-KY specifications
- Not even close to the mark
- We've got to get together sooner or later because the revolution's here and you know it's right
- Fig. 1. Passing and non-passing scribe test results
- Fig. 2. Example of cathodic delamination
- Fig. 3. Pull-off adhesion showing at least three different loci of failure
- Fig. 4. Blistering failure from a WAC vesselEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6210 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30360
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 34, N° 12 (12/2017) . - p. 26-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19542 - Périodique Bibliothèque principale Documentaires Disponible Hybrid epoxy-SiO2/GO nanosheets anti-corrosive coating for aeronautic aluminum Al6061-T5 / Jevet E. D. López-Campos in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Hybrid epoxy-SiO2/GO nanosheets anti-corrosive coating for aeronautic aluminum Al6061-T5 Type de document : texte imprimé Auteurs : Jevet E. D. López-Campos, Auteur ; José Mojica-Gómez, Auteur ; Alfredo Maciel-Cerda, Auteur ; Víctor M. Castano, Auteur ; Genoveva Hernandez-Padron, Auteur Année de publication : 2024 Article en page(s) : p. 559-574 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Anticorrosifs
Anticorrosion
Avions -- Revêtements
Caractérisation
Couches minces
Dioxyde de silicium
Epoxydes
Essais accélérés (technologie)
Essais dynamiques
Métaux -- Revêtements protecteurs
Mouillabilité
Oxyde de graphène
Revêtements organiques
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The mechanical and anti-corrosive evaluation of a hybrid epoxy resin–SiO2 and graphene oxide (GO) are presented. Three composite materials were prepared with 0%, 0.1 wt% and 0.5 wt% GO concentrations. The hybrid material was prepared by the sol-gel process incorporating the silica particles in situ within the epoxy resin (ER) matrix and previously that ER was functionalized with carboxyl groups using abietic acid and labeled as functionalized epoxy resin. The deposition of the three hybrids in aluminum 6061 substrates was made by blade coating, measuring wet and dry film thickness. The study of mechanical properties involved adhesion, pencil scratch hardness, and abrasion test methods where the incorporation of 0.5 wt% of GO improved the mechanical properties considerably. The anti-corrosive properties of the coatings were evaluated through electrochemical impedance spectroscopy and accelerated corrosion using a salt spray chamber showing that GO forms an anti-corrosive barrier increasing the operation life of the coatings in corrosive environments. Anti-ice properties were related to the contact angle measurement from which the GO concentrations showed more hydrophobic behavior. All the tests were carried out according to ASTM standards. The incorporation of 0.5% of GO showed a significant improvement in the mechanical and anti-corrosive results, improving corrosion resistance up to 500 h. The abrasion tests had an increase in 35%, its hardness up to 9H, and the wear index improved by 29.14% compared with composites with 0.1 wt% of GO and without GO. The HREF1 and HREF5 materials do present an increase in the contact angle thanks to the incorporation of graphene oxide. The results of electrochemical impedance spectroscopy and the impedance curves show a better behavior for the HREF5 composite due to the difference in resistance over time. Note de contenu : - MATERIALS
- METHODOLOGY : Synthesis - Preparation of aluminum substrates - Preparation of hybrid coatings
- CHARACTERIZATION : Mechanical tests - Corrosion test
- RESULTS AND DISCUSSION : GO nanosheets characterization - Spectroscopic coatings characterization - SEM characterization - Mechanical characterization - Accelerated corrosion - Electrochemical impedance spectroscopy (EIS) - Corrosion mechanism - Wettability
- Table 1 : Adhesion, hardness, and abrasion results for specific thickness (*2 mm grid cut for thickness greater than 50 um)
- Table 2 : Wear index calculations (ASTM D4060-19)
- Table 3 : EIS equivalent circuit model results for each element for the hybrid coatingsEn ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00838-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40777
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PermalinkInfluence of hydrothermal aging process on components and properties of waterborne fire-resistive coatings / Ying Dong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 2 (03/2014)
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