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Advanced testing procedures for high performance coatings / Flavio Deflorian in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 908 (09/2000)
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Titre : Advanced testing procedures for high performance coatings Type de document : texte imprimé Auteurs : Flavio Deflorian, Auteur ; Stefano Rossi, Auteur ; Pier Luigi Bonora, Auteur Année de publication : 2000 Article en page(s) : p. 81-87 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau revêtement Peinture anticorrosion Industrie automobile Protection corrosion Essai brouillard salin Impédance électrique Méthode électrochimique Etude comparative expérimentale Spectrométrie impédance Index. décimale : 667.9 Revêtements et enduits Résumé : In the first part of this work, an integrated approach incorporating electrochemical (electrochemical impedance spectroscopy), calorimetric (differential scanning calorimetry), mechanical (dynamic mechanical thermal analysis), and infrared spectroscopy (Fourier transform infrared spectroscopy) techniques was used to characterize some organic coatings from the automotive industry. Comparison of the results obtained with different techniques allows not only a higher precision in the evaluation of natural or artificial degradation, which is very difficult to obtain using traditional techniques, but also better data interpretation and, therefore, the possibility of understanding the different degradation mechanisms. In the second part, some preliminary results concerning the comparison of salt spray exposure and EIS measurements are discussed. The statistical analysis of the results showed that the degradation mechanism in the two cases is completely different and, therefore, the information which is obtained with the two testing approaches is also different. With EIS measurements obtained in immersion, it is possible to monitor, in particular, the barrier properties of the coatings, which are dominated by the presence of defects. In the case of salt spray (without scratch), the main property to be measured is the loss of adhesion which causes blister formation. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5790
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 908 (09/2000) . - p. 81-87[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001213 - Périodique Bibliothèque principale Documentaires Disponible Artificial versus natural weathering tests / Flavio Deflorian in EUROPEAN COATINGS JOURNAL (ECJ), N° 10 (10/2012)
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Titre : Artificial versus natural weathering tests : Making sense of the comparison Type de document : texte imprimé Auteurs : Flavio Deflorian, Auteur ; Michele Fedel, Auteur ; Stefano Rossi, Auteur Année de publication : 2012 Article en page(s) : p. 18-23 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.
Essais accélérés (technologie)
Métaux -- Revêtements protecteurs
Revêtements -- Détérioration
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Testing and measuring - The protective properties of organic coated galvanised steel for outdoor applications are generally evaluated by means of accelerted laboratory tests, including electro-chemical techniques. How can these accelerated tests be correlated with natural exposure in different environments ? Note de contenu : - Natural ageing
- One year of ageing
- Decrease in impedancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16044
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Code-barres Cote Support Localisation Section Disponibilité 14206 - Périodique Bibliothèque principale Documentaires Disponible Durability of vitreous enamel coatings and their resistance to abrasion, chemicals, and corrosion : a review / Stefano Rossi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
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Titre : Durability of vitreous enamel coatings and their resistance to abrasion, chemicals, and corrosion : a review Type de document : texte imprimé Auteurs : Stefano Rossi, Auteur ; Francesca Russo, Auteur ; Massimo Calovi, Auteur Année de publication : 2021 Article en page(s) : p. 39-52 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Durée de vie (Ingénierie)
Emaux
Résistance à l'abrasion
Résistance chimique
Revêtement émailIndex. décimale : 667.9 Revêtements et enduits Résumé : Vitreous enamels represent a class of coatings with different technological properties, mainly appreciated for the protection they guarantee to the covered substrates. This review introduces enamel coatings, describing their production technologies and presenting the main properties affecting the enamel’s durability. Firstly, this review article introduces the most important studies regarding the improvement in abrasion resistance, highlighting both successes and failures. Afterward, the work reveals an outlook about the resistance to chemicals, underlining the good resistance of enamels toward acidic chemicals and discussing the results of studies aimed to improve their performances toward alkaline solutions. This review also considers the corrosion protection property of enamels, highlighting the high barrier effect they provide against the absorption of aggressive substances toward metal substrates. Finally, new perspectives and possible future research paths are presented, being aware that this kind of coating offers both good product protection and functional integrity over time. Note de contenu : - ENAMEL PROPERTIES AFFECTING DURABILITY : Resistance to abrasion - Resistance to chemicals - Corrosion protection properties DOI : https://doi.org/10.1007/s11998-020-00415-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00415-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35349
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Code-barres Cote Support Localisation Section Disponibilité 22605 - Périodique Bibliothèque principale Documentaires Disponible Polymethyl (hydro)/polydimethylsilazane-derived coatings applied on AA1050: effect of the dilution in butyl acetate on the structural and electrochemical properties / Michele Fedel in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)
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Titre : Polymethyl (hydro)/polydimethylsilazane-derived coatings applied on AA1050: effect of the dilution in butyl acetate on the structural and electrochemical properties Type de document : texte imprimé Auteurs : Michele Fedel, Auteur ; Stefano Rossi, Auteur ; Flavio Deflorian, Auteur Année de publication : 2019 Article en page(s) : p. 1013-1019 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages
Couches minces
Hydrophobie
Oléophobie
Polysilazanes
Revêtements anti-graffitis
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Polyorganosilazane (PSZ) has been used for many years as a ceramic precursor for the preparation of silicon carbonitrides. Recently, polymethyl (hydro)/polydimethylsilazane-derived coatings that can be cured with atmospheric moisture at low temperatures have attracted interest due to their hydrophobic nature and electrochemical properties. In this work, polymethyl (hydro)/polydimethylsilazane-derived coatings have been deposited on aluminum alloy AA1050. The effect of the PSZ precursor concentration (5–40 v/v%) on the final properties of the coatings has been investigated. Butyl acetate has been employed as solvent. The layers were applied on the substrate by dipping. The experimental results showed that the concentration of the PSZ in the solvent strongly affects the dry thickness of the hybrid layer. The electrochemical impedance spectroscopy measurements revealed that the coatings derived from PSZ precursor concentration higher than 20 v/v% are protective and homogenous. Contact angle measurements evidenced that the presence of the coatings increased the hydrophobicity of the substrate as well as the oleophobicity regardless of the dilution in the organic solvent. The graffiti resistance of the coatings has been demonstrated to be acceptable regardless of the dilution of the PSZ precursor, in the investigated range. DOI : 10.1007/s11998-018-00176-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00176-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32857
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Code-barres Cote Support Localisation Section Disponibilité 21127 - Périodique Bibliothèque principale Documentaires Disponible Validation of adhesion characterization methods for antistick coatings applied in cooking systems / Stefano Rossi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
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Titre : Validation of adhesion characterization methods for antistick coatings applied in cooking systems Type de document : texte imprimé Auteurs : Stefano Rossi, Auteur ; Federico Valdrè, Auteur ; Massimo Calovi, Auteur Année de publication : 2022 Article en page(s) : p. 1287-1301 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anti-adhérence (matériaux)
Caractérisation
Essais d'adhésion
Essais de résilience
Essais dynamiques
Polytétrafluoréthylène
Revêtements -- Propriétés mécaniques
Revêtements organiques
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : This study aims to validate an effective methodological analysis for the characterization of the adhesion values of antistick coatings employed in cooking systems. The morphology and chemistry of four different industrial products were investigated by roughness measurements, electron microscopy observations and infrared spectroscopy analysis. The adhesion of the coatings was evaluated comparing various techniques, such as the surface contact angle measurements, the pull-off test and the single lap-joint tensile shear method, in synergy with degradation phenomena simulated by P.E.I. abrasion and dishwashing tests. The single lap-joint tensile shear test was able to evaluate evident differences between all the proposed coatings, regardless of their state of deterioration, featuring the best selectivity among the used methods. However, the pull-off test proved to be a viable and more economical alternative for fast evaluation techniques, considering the overall instrument costs. While all the polytetrafluoroethylene-based systems turned out to be totally uninfluenced by the chemical attacks performed during the dishwasher cycles, the sol–gel coating exhibited lower performances of the applied releasing agent, before and after the mechanical degradation tests. Therefore, sol–gel coatings, despite being proposed as valid alternatives to PTFE ones, do not achieve the same quality standards in terms of releasing properties, being in addition much more sensible to degradation and loss in performances. Note de contenu : - EXPERIMENTAL : Materials - Characterization
- RESULTS AND DISCUSSION : Coatings characterization - Antistick properties evaluation - Wear and abrasion resistance - Antistick and degradation correlations
- Table 1 : Coatings used for antistick methods validationDOI : https://doi.org/10.1007/s11998-022-00611-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00611-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38054
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Code-barres Cote Support Localisation Section Disponibilité 23574 - Périodique Bibliothèque principale Documentaires Disponible