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Comprehensive study on the electrochemical, morphological, and adhesion properties of Cr-free thin film: with and without polyurethane coating / Shamim Roshan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)
[article]
Titre : Comprehensive study on the electrochemical, morphological, and adhesion properties of Cr-free thin film: with and without polyurethane coating Type de document : texte imprimé Auteurs : Shamim Roshan, Auteur ; Ali Asghar Sarabi, Auteur Année de publication : 2021 Article en page(s) : p. 761-776 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acide hexafluorotitanique
AluminiumL'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.
Angle de contact
Anticorrosifs
Anticorrosion
Arrachement (matériaux)
Electrochimie
Essais d'adhésion
Essais de brouillard salin
Essais de résilience
Essais dynamiques
Polyuréthanes
Revêtement de conversion
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : The deposition process of titanium-based conversion coating (Ti-CC) and the influence of this layer on adhesion strength and anticorrosion performance of polyurethane coatings were investigated. Aluminum 2024-T3 (Al-2024) substrates were treated by Ti-CC at different pH (2.5, 3.5, 4.5, 5.5), Ti concentrations (0.5, 1, 5, 10 g/L), and immersion times (0, 30, 120, 300, 600 s). Electrochemical impedance spectroscopy (EIS) and direct current polarization (DC) were used to evaluate the anticorrosion performance of the different samples. The microstructure, chemical composition, and surface characteristics of the samples were studied by field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy, atomic force microscopy, X-ray photoelectron spectroscopy (XPS), and contact angle measuring device. The anticorrosion resistance and adhesion property of the polyurethane coating were examined by salt spray and pull-off tests, respectively. Results demonstrated that the surface treatment of the Al-2024 substrate in titanium bath enhanced the anticorrosion performance of the substrate. According to the results of EIS and DC polarization, the sample treated in (Ti = 1 g/L, t = 2 min and pH = 4.5) showed the highest anticorrosion resistance (22.90 kohm cm2) and lower current density (icorr = 2.05 µA/cm2). The FE-SEM images revealed more uniformity and compact structure at the optimized condition. XPS spectrum demonstrated that the Al-2024 substrate was covered by aluminum and titanium oxide/hydroxide after surface treatment. Contact angle measurement indicated that surface treatment of the substrate by Ti-CC caused an increase in hydrophobicity of the surface. The Ti-CC improved the adhesion strength and anticorrosion performance of the polyurethane coating applied on Al-2024 substrates. Note de contenu : - Optimization of solution pH and H2TiF6 concentration
- Open Circuit Potential (OCP) study
- Immersion time study
- Morphology
- Contact angle measurement
- XPS study
- Pull-off adhesion test
- Salt spray
- Table 1 : Electrochemical data obtained from EIS measurements after fitting with the equivalent circuit for the untreated sample and treated ones in H2TiF6 solution with different pH and concentrations
- Table 2 : The obtained data from DC polarization of samples treated in Ti-solution with different pH and concentrations
- Table 3 : Electrochemical data obtained from EIS measurements after fitting with equivalent circuit for the untreated sample and treated ones in H2TiF6 solution with different immersion times (0, 30, 120, 300, 600 s)
- Table 4 : The obtained data from DC polarization of samples treated in the Ti-solution with different immersion times (0, 30, 120, 300, 600 s)
- Table 5 : The mean values of surface roughness of the sample treated with H2TiF6 solution (Ti = 1 g/L and pH = 4.5) during different immersion times
- Table 6 : Water contact angle values of samples treated with H2TiF6 (Ti = 1 g/L and pH = 4.5) during different immersion timesDOI : https://doi.org/10.1007/s11998-020-00441-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00441-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35928
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 3 (05/2021) . - p. 761-776[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22785 - Périodique Bibliothèque principale Documentaires Disponible A concise review on corrosion inhibitors : types, mechanisms and electrochemical evaluation studies / I. A. Wonnie Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)
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Titre : A concise review on corrosion inhibitors : types, mechanisms and electrochemical evaluation studies Type de document : texte imprimé Auteurs : I. A. Wonnie Ma, Auteur ; Sh. Ammar, Auteur ; Sachin S. A. Kumar, Auteur ; S. Ramesh, Auteur Année de publication : 2022 Article en page(s) : p. 241–268 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Electrochimie
Inhibiteurs (chimie)Index. décimale : 667.9 Revêtements et enduits Résumé : This article presents a concise review of different types of inhibitors for corrosion protection on metal surfaces. Corrosion inhibitors can be of different types, which include organic, inorganic and hybrid (organic/inorganic) materials. They are also classified as cathodic, anodic and/or mixed-type inhibitors, which are based on the active inhibitor molecules that retard the corrosion process. Silicate, nitrites, molybdates, phosphates, zinc salt and cerium salt are widely used as inorganic inhibitors. Many organic compounds have been widely utilized as inhibitors. Corrosion protection will be obtained by various mechanisms such as physisorption, chemisorption, barrier protection, thin-film formation and electrochemical processes. The type of inhibitors, inhibition mechanism and the evaluation methods have been explained in detail. Note de contenu : - TYPE OF CORROSION INHIBITORS : Inorganic inhibitors - Organic inhibitor - Hybrid organic-inorganic inhibitor
INHIBITION MECHANISM OF CORROSION INHIBITORS : Adsorptive interaction of corrosion inhibitors on the metal surface - Inhibition of electrochemical process - Electrochemical evaluation for corrosion inhibitor studies
- Table 1 Type of organic inhibitors and inhibition efficiency
- Table 2 Inhibition efficiency of some corrosion inhibitors evaluated by electrochemical measurement deployed for various type of metal corrosion reductionDOI : https://doi.org/10.1007/s11998-021-00547-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00547-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37156
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 1 (01/2022) . - p. 241–268[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23313 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Concrete protection system Type de document : texte imprimé Auteurs : Harish Agrawal, Auteur Année de publication : 2021 Article en page(s) : p. 122-128 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs
Matériaux cimentaires -- Revêtements protecteurs
Plâtres
Polymères
Revêtements -- Additifs
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : When the surface is exposed to atmospheric influences it is observed that the main damage factors are corrosion and carbonation, it is sufficient to cover the surface with cernentitious slurries for protecting concrete structures, facades and building interiors as well as minera) substrates. The cementations slurries helping to reduce the concrete carbonation process.
To ensure long lasting durability, the exposure condition on a structure has an influential role on its durability. Decision to use or not a protective coating shall be taken after thorough consideration by selecting different types of coating system based on different polymers, Portland cernent and many other additives.Note de contenu : - Corrosion inhibitors (for reinforcement)
- Coatings
- Selection of various principles for coatings protection of concrete
- Functional requirements of coatings
- Types of coatings
- Pigmented coatings based on acrylic emulsions
- Clear sealer coating
- Plaster systems
- Solid plaster system
- Polystyrene boarder
- Finish coat
- Water-based acrylics coatings
- Acrylic coating for outdoor application
- Outdoor coatings for other applications
- Solvent-based acrylics
- Anti-carbonation coatings
- Carbonation prevention using anti carbonation coatings
- Elastomeric traffic coatings
- Textured coating
- Epoxy coatings
- Breathable epoxies
- Urethane coatings systems
- Flexible urethane coatings
- Other specialized coatings
- Best coatings for basement walls
- Best coating for basement floors
- Polyurea coatings
- Silicones/silanes/siloxanes/silicates coatingsEn ligne : https://drive.google.com/file/d/1pDoQqNsWJ4R4X-awwHYaGIVC3sMou-Rl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36471
in PAINTINDIA > Vol. LXXI, N° 8 (08/2021) . - p. 122-128[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22922 - Périodique Bibliothèque principale Documentaires Disponible Conductive polymers as anticorrosive additive for marine coatings : a review / Umesh Wagh in PAINTINDIA, Vol. LXX, N° 9 (09/2020)
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Titre : Conductive polymers as anticorrosive additive for marine coatings : a review Type de document : texte imprimé Auteurs : Umesh Wagh, Auteur ; Vivek Krishnan, Auteur ; Ashok Kumar, Auteur Année de publication : 2020 Article en page(s) : p. 84-95 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs
Anticorrosion
Conducteurs organiques
Corrosion
Epoxydes
Métaux -- Oxydation anodique
Métaux -- Revêtements protecteurs
Passivité (Chimie)
Polyaniline
Polythiophènes
Revêtements -- Additifs:Peinture -- Additifs
Système de libération contrôlée (technologie)
ThermogravimétrieIndex. décimale : 667.9 Revêtements et enduits Résumé : Protection of metals and alloys against corrosion by using organic coatings is an area of great interest. Thus, the development of new paints attempts to improve the performance increasing their corrosion resistance and extending the fields of application. Within coating technology, there is increasing interest in the development of efficient anticorrosive additives able to replace the conventional inorganic anticorrosive pigments usually added to paints, which may have detrimental effects on both environment and health. A number of recent studies have evidenced that the modification of a paint formulation by the addition of a low concentration of conducting polymer (0.2-0.3%, w/w) increases sign ificantly the protective properties of the coating. Here we focus on the principles of anticorrosive additives based on conducting polymers for marine paints. The article reviews the most important findings achieved in recent studies. The general aim of this work is to set new standards for research and development in the paint industry by focussing on the addition of a conducting polymerto paint formulation without losing its properties and assuring a good performance. Note de contenu : - Basics of corrosion
- Introduction to conductive polymers
- Conventional paint system for corrosion protection
- Conductive polymers (CP) based anticorrosive paints
- Mechanism of corrosion protection using conducting polymers
- Anodic protection mechanism
- Controlled inhibitor release mechanism
- Fig. 1 : Electrochemical corrosion showing rusting of plain carbon steel
- Fig. 2 : Chemical structure of polythiophene and polyaniline
- Fig. 3 : Outline of the redox-reactions that combines the emeraldine form and the leuco forms of polyaniline and their chemical structures
- Fig. 4 : TGA curve of epoxy paint with and without corrosion inhibitors
- Fig. 5 : Photographs of the painted rectangular test pieces (scale bar: 1 cm): (a) initial sample, (b) and (c) samples without and with conducting polymer, respectively, optical micrographs from the polymeric films (scale bar: 200_m) and scanning electron micrographs (scale bar: 100 _m)
- Fig. 6 : Passivation of steel by conducting PANI-based paint coating
- Fig. 7 : Controlled inhibitor release mechanism for a metal, M coated by a CP layer such as PANI doped with an ion, A-which acts as a corrosion inhibitorEn ligne : https://drive.google.com/file/d/14IhkCrcgpw7YVYEajqQYxADflGg77zRs/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34662
in PAINTINDIA > Vol. LXX, N° 9 (09/2020) . - p. 84-95[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22359 - Périodique Bibliothèque principale Documentaires Disponible Conférences Rencontres Matières premières 2012 / 2012
Titre : Conférences Rencontres Matières premières 2012 Type de document : texte imprimé Année de publication : 2012 Importance : Pag. Mult. Présentation : ill. Format : 30 cm Langues : Multilingue (mul) Catégories : Anticorrosifs
Antimousse
Biomatériaux
Colles
Congrès et conférences
Débullants
Liants
Matières premières
Revêtements
Revêtements -- Additifs
Revêtements en phase aqueuse:Peinture en phase aqueuse
Silicates alcalinsIndex. décimale : 667.9 Revêtements et enduits Note de contenu : - Antimousses et débullants pour phase aqueuse
- Inhibiteurs de corrosion VEGERUST : évolution vers des solutions biosourcées
- Liants et colles inorganiques à base de silicates alcalinsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18021 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14901 667.9 CON (2012) Colloque, congrès, etc. Bibliothèque principale Documentaires Disponible Considerations for reconstruction of a bridge exhibiting staining / Cynthia O'Malley in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 4 (04/2018)
PermalinkConsidering the effect of graphene loading in water-based epoxy coatings / T. Monetta in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)
PermalinkConsistent finishes with powder coatings and paints in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 12, N° 4 (2019)
PermalinkContribution à l'étude par mesure de résistance de polarisation du pouvoir protecteur des films de peinture appliqués sur substrats d'acier / Jean-Claude Laout / 1976
PermalinkPermalinkPermalinkCorrosion and its control in petroleum industry / Nayan Jyoti in PAINTINDIA, Vol. LXVII, N° 3 (03/2017)
PermalinkCorrosion and its control in sugar industry / Raghavendra Pratap in PAINTINDIA, Vol. LXVII, N° 1 (01/2017)
PermalinkCorrosion and protection of aluminium / Durgesh Kumar Soni in PAINTINDIA, Vol. LXVIII, N° 2 (02/2018)
PermalinkCorrosion and protection of bridges (Part 1) / P. K. Kamani in PAINTINDIA, Vol. LXV, N° 1 (01/2015)
PermalinkCorrosion and protection of bridges (Part 2) / P. K. Kamani in PAINTINDIA, Vol. LXV, N° 3 (03/2015)
PermalinkCorrosion behavior of 2024 aluminum alloy anodized in presence of permanganate and phosphate ions / Maysam Mohammadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 2 (03/2013)
PermalinkCorrosion behavior of AISI 316 stainless steel coated with modified fluoropolymer in marine condition / E. Husain in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)
PermalinkCorrosion correctors / Martin Gerlitz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4522 (03/2008)
PermalinkLa corrosion, un enjeu économique in GALVANO ORGANO, N° 843 (12/2015)
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