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Improvement of barrier properties of Cr-free pretreatments for coil-coated products / Ville Saarimaa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)
[article]
Titre : Improvement of barrier properties of Cr-free pretreatments for coil-coated products Type de document : texte imprimé Auteurs : Ville Saarimaa, Auteur ; Antti Markkula, Auteur ; Jyrki Juhanoja, Auteur ; Bengt-Johan Skrifvars, Auteur Année de publication : 2015 Article en page(s) : p. 721-730 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Coil coatings
Laque et laquage
Matériaux -- Propriétés barrières
Peinture sur panneau
Résistance à l'humiditéIndex. décimale : 667.9 Revêtements et enduits Résumé : Humidity resistance of pretreated and coil-coated panels was evaluated with a special emphasis on the process parameters that govern the uniformity and barrier properties of hexafluorotitanic acid-based pretreatment layers. Humidity resistance tests showed that good barrier effect was obtained with pretreatments in the coating weight range of about 2–17 mg Ti/m2. It was further verified by rinsing experiments that a fully reacted pretreatment layer is achieved at the very low end of the optimal coating weight range. Increasing the coating weight leads to the formation of precipitated, loosely bonded porous structure, which was detrimental to humidity resistance. In addition to the coating weight, the microscale pretreatment layer uniformity is of utmost importance for good barrier properties. Electron probe microanalysis measurements provide an efficient tool to assess the pretreatment layer uniformity and facilitate monitoring of process adjustments with clear correlation to humidity resistance properties of painted panels. The surface condition of the hot dip-galvanized steel and the material of the application rolls were found to strongly affect the uniformity of the pretreatment layers. Note de contenu : - EXPERIMENTAL : Materials - Sample preparation - Surface characterization - Humidity resistance testing
- RESULTS AND DISCUSSION : Influence of pretreatment coating weight on humidity resistance of painted panels - Evaluation of pretreatment layer retention - SEM imaging of pretreated samples - Influence of surface cleaning on pretreatment layer formation - Influence of roll material and pressure on pretreatment layer formationDOI : 10.1007/s11998-015-9663-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9663-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24406
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 721-730[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17366 - Périodique Bibliothèque principale Documentaires Disponible Influence of deposition parameters on the behavior of nitro-cobalt-based and Ti-hexafluoride-based pretreatments / A. Cristoforetti in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)
[article]
Titre : Influence of deposition parameters on the behavior of nitro-cobalt-based and Ti-hexafluoride-based pretreatments Type de document : texte imprimé Auteurs : A. Cristoforetti, Auteur ; M. Fedel, Auteur ; F. Deflorian, Auteur ; S. Rossi, Auteur Année de publication : 2022 Article en page(s) : p. 859-873 Note générale : Bibliogr. Langues : Américain (ame) 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.
Adhésion
Coil coatings
Essais accélérés (technologie)
Essais de brouillard salin
Galvanisation
Revêtement de conversion
Revêtements:Peinture
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Two different chemical pretreatments for hot-dip galvanized steel, typically used in the coil coating field, were considered comparing their electrochemical behavior (electrochemical impedance spectroscopy (EIS), potentiodynamic curves) after a morphological characterization of the deposited films. The wet and dry adhesion of the following deposited paint is tested employing neutral salt spray chamber test (NSST) and pull-off test. Despite these technologies being widely adopted in industrial plants, the literature lacks some relevant research about the actual improvement in durability, especially in the case of nitro-cobalt based conversion. This paper analyzes the factors affecting the protection provided by the deposited film and varying the principal production parameter, the immersion time in the chemical conversion solution, an optimization study was carried out. The better behavior of the titanium hexafluoride-based artificial conversions, with respect to the nitro-cobalt one, is highlighted. Such treatment analyzed as bare surface gives higher impedance modulus and lower corrosion current density compared to the second one. For both the technologies, the uselessness of longer treatment periods in terms of performance improvement is found. The results obtained from the electrochemical characterization are in accordance with the technological test on the painted samples, such as NSST, where the delamination rate is significantly higher for the substrate treated employing a nitro-cobalt-based bath. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS
- RESULTS AND DISCUSSION : Morphology and composition - Free corrosion potential trend - Impedance spectra - Potentiodynamic polarization curves - Neutral salt spray chamber test, adhesion of painted samples
- Table 1 : Sample's production parameters and corresponding code
- Table 2 : Comparison between surface and cluster composition by EDXS analysis on T-300 sample
- Table 3 : Numerical data obtained from electrochemical measurements carried out in aerated conditionsDOI : https://doi.org/10.1007/s11998-021-00563-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00563-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38081
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 859-873[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23605 - Périodique Bibliothèque principale Documentaires Disponible Liquid polyester resin : a vehicle for coil coating / Anuradha Satpute in PAINTINDIA, Vol. LVIII, N° 11 (11/2008)
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Titre : Liquid polyester resin : a vehicle for coil coating Type de document : texte imprimé Auteurs : Anuradha Satpute, Auteur ; L. T. Gangotri, Auteur Année de publication : 2008 Article en page(s) : p. 87-94 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Coil coatings
PolyestersIndex. décimale : 667.9 Revêtements et enduits Résumé : Liquid polyester resins of molecular weight 1000-3000 having terminating carboxy groups were prepared using diethylene glycol and maleic anhydride. Low molecular weight liquid polyester (100 % NVM) was found to have the viscosity as low as 10 poise. 1 % concentration of hexamine as curing agent was found to be sufficient to give hard dry film within 1 minute at 200°C stoving temperature. Various coil coating compositions were prepared using these liquid polyester resins and 1 % hexamine along with colored pigments. The coatings were stoved at 200°C and evaluated for their film properties. The coatings exhibited excellent film properties with scratch hardness more than 2000 gms and 6H pencil hardness, excellent flexibility (OT), excellent resistance to solvents, water and chemicals. They also showed excellent MEK double rub resistance for 100 times, 100 % adhesion and excellent impact resistance. The coil coating compositions did notneed any primer. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6962
in PAINTINDIA > Vol. LVIII, N° 11 (11/2008) . - p. 87-94[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011351 - Périodique Bibliothèque principale Documentaires Disponible Making light work for a living / Dawn Skinner in EUROPEAN COATINGS JOURNAL (ECJ), N° 10/2009 (10/2009)
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Titre : Making light work for a living : Innovations drive market growth in UV/EB applications across Europe Type de document : texte imprimé Auteurs : Dawn Skinner, Auteur Année de publication : 2009 Article en page(s) : p. 18-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Coil coatings
Dépôt en phase vapeur
Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Some key future growth areas where radiation curing technology offers substantial advantages because of its rapid curing, High performance and low VOC levels are discussed. The main areas considered are waterborne UV coatings, coil coating, protection of PVD coating on plastic parts, in-situ coating floors are printed electronics. En ligne : https://drive.google.com/file/d/1k5ii4qmU_Krwu6gtf6KNJyKPeUBAJSUK/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6282
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 10/2009 (10/2009) . - p. 18-20[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011633 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : On a roll with coil coating : OEMs that make parts or products from flat-rolled steel, aluminum and other metals are outsourcing to experienced coil coaters Type de document : texte imprimé Année de publication : 2019 Langues : Américain (ame) Catégories : Coil coatings
Colles:Adhésifs
StratifiésIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : For original equipment manufacturers (OEMs) that apply laminate films to metal parts or apply coatings as decorative finishes, the in-house manufacturing process requires a significant investment in equipment, plant floor space and ongoing maintenance for what can be a very temperamental process. In addition, failure to precisely control the process can lead to laminates that do not bond properly or wrinkle, leading to excessively high scrap rates and even product returns.
For this reason, OEMs are increasingly outsourcing the application of laminate films to experienced coil coaters that can provide alternatives, including : steel, aluminum or other metals in coil or sheet form with pre-applied (dry) adhesive; or fully laminated product that eliminates in-house processing altogether.
The result for OEMs can be significant, both in terms of speeding production and reducing operational costs. However, when paired with the fact that experienced coil coaters can produce high-quality laminated products, it becomes a win-win scenario.
"Many OEMs are not fully aware of the alternatives for outsourcing part of, or all, the lamination operation to coil coaters," explains Dan Chin, president of Universal Chemicals & Coatings (Unichem), a company that specializes in custom adhesives and coatings used in coil processing. "This is often simply because they have 'always done it the same way'—in house—but they can get a high-quality laminated product and eliminate the costs and headaches associated with the process."Note de contenu : - Laminates
- Outsourcing to coil coaters
- Adhesion challenges
- Making the switchEn ligne : https://www.adhesivesmag.com/articles/96875-on-a-roll-with-coil-coating Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32459
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 26, N° 4 (04/2019)[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20841 - Périodique Bibliothèque principale Documentaires Disponible Polyester weatherability : coupling frontier molecular orbital calculations of oxidative stability with accelerated testing / Carl J. Sullivan in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 67, N° 847 (08/1995)
PermalinkPowder coatings-service through technology and innovation - Part II / Jagmal Singh in PAINTINDIA, Vol. XLVII, N° 10 (10/1997)
PermalinkPowder coatings - service through technology and innovation - Part II / Jagmal Singh in PAINTINDIA, Vol. XLVII, N° 10 (10/1997)
PermalinkPreparation of waterborne phosphated acrylate–epoxy hybrid dispersions and their application as coil coating primer / Jianfeng Yu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 3 (05/2014)
PermalinkReduced titanium dioxide content - What can functional fillers offer ? / Susanne Reiter in PAINTINDIA, Vol. LXV, N° 6 (06/2015)
PermalinkRhéologie des peintures et procédé de couchage au rouleau / Olivier Cohu / 1995
PermalinkPermalinkSolvent selection & effect on coil coating performance / Iris M. Diaz in MODERN PAINT AND COATINGS, Vol. 88, N° 6 (06/98)
PermalinkA study on the adhesion and flexibility in radiation-cured coil coatings / G. C. Simmons in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B1 (02/2004)
PermalinkSustainable coil coatings / Chris Lowe in SURFACE COATINGS INTERNATIONAL, Vol. 106.3 (05-06/2023)
PermalinkPermalinkThe formation of polyester-melamine/urethane coatings / Nadezda Denisova in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4651 (05/2019)
PermalinkThe National Coil Coating Association’s Color Experiment : Potential for converting to CIE color space and deltaE 2000 / David A. Cocuzzi in COATINGS TECH, Vol. 16, N° 1 (01/2019)
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