Advanced testing procedures for high performance coatings / Flavio Deflorian in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 908 (09/2000)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 908 (09/2000) . - p. 81-87 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 [article]

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Artificial versus natural weathering tests / Flavio Deflorian in EUROPEAN COATINGS JOURNAL (ECJ), N° 10 (10/2012)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 10 (10/2012) . - p. 18-23 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 organiques Index. 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 impedance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16044 [article]

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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)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 39-52 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 émail Index. 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 : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35349 [article]

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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)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 4 (07/2019) . - p. 1013-1019 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 électrochimique Index. 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 : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32857 [article]

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The impact of stainless steel flakes as a novel multifunctional pigment for wood coatings / Massimo Calovi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 1031-1047 Titre : The impact of stainless steel flakes as a novel multifunctional pigment for wood coatings Type de document : texte imprimé Auteurs : Massimo Calovi, Auteur ; Stefano Rossi, Auteur Année de publication : 2024 Article en page(s) : p. 1031-1047 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier inoxydable Bois -- Revêtements protecteurs Bois -- Revêtements:Bois -- Peinture Caractérisation Matériaux -- Propriétés fonctionnelles Paillettes Particules (matières) Particules -- Morphologie Résistance à l'abrasion Revêtements -- Propriétés thermiques Revêtements en phase aqueuse -- Additifs Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : The purpose of this research was to determine the influence of three different amounts of stainless steel flakes on the aesthetic features and durability of a waterborne wood paint. Colorimetric measurements and optical microscope observations were employed to assess the impact of this novel pigment on the overall appearance of the coatings. The effect of the different amounts of metallic flakes on the durability of the layers was evaluated by subjecting the samples to UV-B radiation and cyclic thermal shocks, performing infrared spectroscopy analysis, colorimetric inspections, and adhesion test. In addition, the influence of the filler concentration on the coating barrier efficiency was assessed through the liquid resistance and water uptake tests. Moreover, Buchholz hardness indentation test and the scrub test were conducted to quantify the impact of the flakes on the mechanical characteristics of the coatings, such as hardness and abrasion resistance. Finally, the thermal test evidenced a specific role of the flake amount in altering the thermal behavior of the coatings. Ultimately, this work highlights the attractive effect of stainless steel flakes, which are capable of providing an intense coloring and specific aesthetic features to the paint, preserving the surface's barrier-protective properties, increasing the abrasion resistance of the composite layer, and influencing the thermal behavior of the coating. Note de contenu : - MATERIALS AND METHODS : Materials - Sample production - Characterization - RESULTS AND DISCUSSION : Flakes and coatings morphology - Durability of the coatings in aggressive environments - Coatings liquid resistance - Coatings hardness and abrasion resistance - Coatings thermal behavior En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00870-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41075 [article]

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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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