[article]
| Titre : |
Rust morphology characterization of polyurethane and acrylic-based marine antifouling paints after salt spray test on scribed specimens |
| Type de document : |
texte imprimé |
| Auteurs : |
Evangelia D. Kiosidou, Auteur ; Antonis Karantonis, Auteur ; Dimitrios I. Pantelis, Auteur ; Elisabete Ribeiro Silva, Auteur ; João Carlos Moura Bordado, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 1381-1395 |
| 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.
Algues marines
Anticorrosion
Antimicrobiens
Diffractométrie de rayons X
Essais accélérés (technologie)
Essais de brouillard salin
Métaux -- Revêtements protecteurs
Microscopie électronique à balayage
Polyacryliques
Polyuréthanes
Revêtements antisalissures:Peinture antisalissures
Revêtements organiques
Spectroscopie Raman
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A newly developed, polyurethane-based, marine antifouling coating, containing 2% immobilized Econea, was examined in terms of its anticorrosion performance. The novelty of the experimental formulation arises from the immobilization of the biocide which minimizes leaching and was accomplished via a newly developed functionalization method, based on reaction of the biocide with highly reactive isocyanate functionality. The painting system was applied on steel specimens, then scribed with a sharp cutter and examined for 12 weeks in cyclic salt spray exposure. Identification of the rust morphologies was performed with XRD, Raman spectroscopy, SEM, and EDS methods. The absence of paint deformation during the experiment led to the formation of compact corrosion products, firmly adherent to the substrate, allowing transformation to more protective forms, such as oxides (hematite, maghemite, magnetite) and the least harmful of the oxyhydroxides (goethite, feroxyhyte), found in the mixture, ensuring sufficient corrosion protection. The unscratched part of the paint served as a barrier to corrosion product expansion beyond the scribed areas. An acrylic-based antifouling system was also examined for reasons of comparison. The experimental formulation exhibited superior anticorrosion performance overall, since the acrylic system presented extended material loss, blistering, checking, and extensive substrate rust coverage beneath the multilayer coat, implying unsatisfactory corrosion protection. |
| Note de contenu : |
- EXPERIMENTAL METHODS AND MATERIALS : Coating systems examined - Accelerated aging tests on scribed specimens - SEM, XRD, and Raman examination of rust samples
- RESULTS AND DISCUSSION : Observation of the scribed areas - XRD examination of rust samples - Raman spectra identification of rust samples - Identification of rust morphologies - Correlation of the observed rust morphologies with paint efficiency |
| DOI : |
10.1007/s11998-017-9939-0 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9939-0.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29642 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 6 (11/2017) . - p. 1381-1395
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Rust morphology characterization of polyurethane and acrylic-based marine antifouling paints after salt spray test on scribed specimens in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)
