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The physical chemistry of organic coatings revisited - viewing coatings as a materials scientist / Gordon P. Bierwagen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 2 (06/2008)
[article]
Titre : The physical chemistry of organic coatings revisited - viewing coatings as a materials scientist Type de document : texte imprimé Auteurs : Gordon P. Bierwagen, Auteur Année de publication : 2008 Article en page(s) : p. 133-155 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Chimie physique et théorique
Chromates
Concentration pigmentaire volumique
Electrochimie
Liquides ioniques
Produits chimiques -- Suppression ou remplacement
Revêtements organiques
Science des matériauxIndex. décimale : 667.9 Revêtements et enduits Résumé : Modern organic coatings are complex materials which must be observed and interpreted from the viewpoint of what has become known as Materials Science. Paints, as most of us first learned to name organic coatings, were originally designed and conceived as art forms. Visual artists developed their own applied colorants; part of an artist’s success depended on these skills (consider Leonardo da Vinci). Today, one’s skills as a materials scientist are perhaps the most crucial attributes of the true coatings scientist. Considering pigmented organic coating as random heterogeneous composite materials was the key to my research group’s contributions in improving the understanding of pigment volume concentrations (PVC) and critical PVC effects in coatings. Seeking to develop and improve electrochemical materials characterization techniques for measuring and predicting the corrosion protective properties of coatings has driven our research at North Dakota State University (NDSU) in this area. Analyzing the performance of protective coatings for exterior bronze statues and viewing these coatings from the materials requirements of the art conservator has directed our activities in conservation science. The use of the methods of modern electrochemical materials science has been the key to our development of Mg-rich primers for entirely Cr-free corrosion protection of aircraft alloys. Our work on developing methods to perform material measurements directly on coatings during their field use has directed our recent studies of embedded sensors in coatings. Our work in these areas will be reviewed and current results presented. Forecasts of future developments in these and other areas of coatings science will be presented, extrapolating from present developments in materials science. Incorporating materials concerns, especially the methods and concepts of nanomaterials science, into coatings science will be of paramount importance to future research and development in coatings. DOI : 10.1007/s11998-007-9066-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9066-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2992
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 2 (06/2008) . - p. 133-155[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010394 - Périodique Bibliothèque principale Documentaires Disponible The polyaniline-modified TiO2 composites in water-based epoxy coating for corrosion protection of Q235 steel / Xuehui Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)
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Titre : The polyaniline-modified TiO2 composites in water-based epoxy coating for corrosion protection of Q235 steel Type de document : texte imprimé Auteurs : Xuehui Liu, Auteur ; Peimin Hou, Auteur ; Xia Zhao, Auteur ; Xiumin Ma, Auteur ; Baorong Hou, Auteur Année de publication : 2019 Article en page(s) : p. 71-80 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier -- Conservation
Anticorrosifs
Anticorrosion
Chimie analytique
Dioxyde de titane
Epoxydes
Métaux -- Revêtements protecteurs
Polyacrylonitrile
Revêtement autoréparant
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The development of active systems to protect metal substrates against corrosion is a promising approach for many industrial applications. In this work, a self-healing coating based on TiO2 particles modified with polyaniline (PANI) was prepared for corrosion protection of Q235 steel. TiO2/PANI particles were synthesized by in situ polymerization and dispersed into a water-based epoxy coating. The structure and morphology of as-prepared TiO2/PANI particles were characterized by FTIR, XRD, and SEM. The anticorrosion performance of the coating was studied by electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM). EIS analysis showed improved corrosion protection properties in the presence of TiO2/PNAI particles. SECM measurements were performed to monitor the reduction of oxygen process as a function of exposure time in 3.5% NaCl solution. SECM results showed that the epoxy coating with TiO2/PANI particles had a superior corrosion protection relative to the blank coating after artificial defect exposure to the corrosive environment. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of TiO2 particles - Preparation of TiO2/PANI particles - Preparation of water-based epoxy coatings - Characterization
- RESULTS AND DISCUSSION : Characterization of TiO2 particles - Surface properties of the coatings - Evaluation of anticorrosion performanceDOI : 10.1007/s11998-018-0101-4 En ligne : https://link.springer.com/article/10.1007/s11998-018-0101-4 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31966
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 1 (01/2019) . - p. 71-80[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20659 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : The right mix : Interpenetrating silicone-polyurethane-epoxy networks for improved solventless anticorrosive primers Type de document : texte imprimé Auteurs : A. Anand Prabu, Auteur ; M. Alagar, Auteur Année de publication : 2004 Article en page(s) : p. 59-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion
Anticorrosifs
Anticorrosion
Epoxydes
Polyamines
Polyuréthanes
Primaire (revêtement)
Réseaux polymères
Résistance à l'abrasion
Revêtements -- Additifs
Revêtements -- Propriétés mécaniques
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
Traction (mécanique)
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : Intercrosslinking networks of silicone modified polyurethane-epoxy resins, cured with an aromatic polyamine adduct and polyamidoamine, lead to solvent-free coatings with an exceptional combination of good adhesion, high tensile strength, abrasion and chemical resistance, in particular upon curing with polyamine. Addition of zinc powder further improves abrasion and corrosion resistance. Note de contenu : - Status of IPN coatings
- Polyurethanes and siloxanes as epoxy modifiers
- Materials
- Formulation of the PU-modified epoxy primer
- Formulation of the silicone modified PU-epoxy primer
- Substrate preparation
- Coatings evaluation studies
- Improved physico-mechanical and chemical behaviour
- Addition of zinc exhibited maximum corrosion protection
- Polyamines cure betterEn ligne : https://drive.google.com/file/d/1-kGI7DsZOK_AOgbVTZiiRRWmZR-Pose0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24206
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 1-2/2004 (01-02/2004) . - p. 59-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000668 - Périodique Bibliothèque principale Documentaires Disponible The success of glass flake epoxies / Toby Stein in PROTECTIVE COATINGS EUROPE (PCE), Vol. 4, N° 4 (10-11-12/2012)
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Titre : The success of glass flake epoxies Type de document : texte imprimé Auteurs : Toby Stein, Auteur Année de publication : 2012 Article en page(s) : p. 12-14 Langues : Anglais (eng) Catégories : Anticorrosifs
Epoxydes
Paillettes
Revêtements organiques
Structures offshore -- Revêtements protecteurs
Traîtements de surface
VerreIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy glass flake technology has been used in the offshore industry for over 30 years to protect the splash zone of offshore assets and heavy duty areas including heli-decks. Note de contenu : - Glass flake epoxy differences
- Splash zone protection
- Type and level of glass flake
- Surface preparation
- Coating performancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16611
in PROTECTIVE COATINGS EUROPE (PCE) > Vol. 4, N° 4 (10-11-12/2012) . - p. 12-14[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14330 - Périodique Bibliothèque principale Documentaires Disponible The use of engineered silica to enhance coatings / Jim Reader in COATINGS TECH, Vol. 17, N° 6 (06/2020)
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Titre : The use of engineered silica to enhance coatings Type de document : texte imprimé Auteurs : Jim Reader, Auteur ; Maria Nargiello, Auteur Année de publication : 2020 Article en page(s) : p. 36-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Brillance (optique) -- Mesure
Charges (matériaux)
Déperlance
Dispersions et suspensions
Fluidisation
Formation de film
Imperméabilisation
Matériaux amorphes
Mouillabilité
Résistance à l'abrasion
Rhéologie
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : The field of coatings technology has utilized many forms of silica-based particles in the last 70 years. This large, varied class of fillers is generically broken into two categories of crystalline and amorphous morphology. With ongoing scrutiny and sensitivity in the coatings industry to move towards less hazards in the workplace, greater emphasis is placed on suitable amorphous technology to replace crystalline silica technology. Amorphous silica is highly adaptable and flexible to be modified in both powder and pre-dispersed forms, and numerous engineered types of technologies have been developed to provide functional solutions to many coatings problems.
Amorphous silica technology has been developed to address functionalities including: rheological control, suspension of pigments and fillers, and reinforcement of coatings film; to impart scratch resistance, hydrophobicity / anti-corrosion benefits, and oleophobicity; as a carrier of trace actives into coatings for homogenous distribution; for flow control, charge, and fluidization enhancement of powdered coatings; and gloss reduction of liquid systems. Particle technology and modification will be addressed along with performance attributes highlighted for each of the types of tailor-made modifications. The importance of proper dispersion and homogenous distribution within a coating matrix will be reviewed.
This article will address how amorphous silica technology is differentiated and engineered to create specially tailored solutions to enhance the performance of coatings and will highlight the latest technical developments in this field.Note de contenu : - Rheology and film formation
- Anti-corrosion/water repellency
- Scratch resistance
- Free flow, fluidization, transfer efficiency
- Gloss control
- Recent developments in silica technology
- Fig. 1 : The silica family tree
- Fig. 2 : Production of pyrogenic (fumed) silica
- Fig. 3 : Primary, secondary, and tertiary structures of fumed silicas
- Fig. 4 : Methanol wettability of differently treated fumed silicas
- Fig. 5 : Thickening efficiency of fumed silica as a function of surface treatment
- Fig. 6 : Improved film formation with fumed silica dispersions
- Fig. 7 : Improved corrosion resistance with hydrohobically treated fumed silica ; coatings based on published guide formulations from Halox
- Fig. 8 : Structure modification of fumed silica and scratch resistance
- Fig. 9 : Homogeneous distribution of silica through a polymer matrix
- Fig. 10 : Improved scratch resistance results in a high-soilds, 2K polyurethane clear coat based on Macrymal SM 510n60LG and Vestanat HB 2640MX
- Fig. 11 : Transfer efficiency and Faraday cage effects
- Fig. 12 : Fluidization efficiency
- Fig. 13 & 14 : Measuring gloss with a reflectometer (DIN EN ISO 2813)
- Fig. 15 : SEM images of a new spherical precipitated silica particles
- Fig. 16 : Viscosity "jump curves" for waterbased silica dispersions
- Table 1 : Comparison of characteristics of different synthetic silicas
- Table 2 : Common surface treatments for fumed silicasEn ligne : https://drive.google.com/file/d/17TVd7hca18xX6Tv0Yq4-_5oKHwAWTdO8/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34358
in COATINGS TECH > Vol. 17, N° 6 (06/2020) . - p. 36-45[article]Réservation
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