Titre : |
Novel multilayer structural epoxy composite coating containing graphene oxide and silanized chromium carbide for the protection of steel structures |
Type de document : |
texte imprimé |
Auteurs : |
Joseph Raj Xavier, Auteur |
Année de publication : |
2022 |
Article en page(s) : |
p. 1713-1730 |
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. Anticorrosifs Anticorrosion Carbure de chrome Epoxydes Matériaux hybrides Métaux -- Revêtements protecteurs Nanoparticules Oxyde de graphène Revêtements organiques Silanes
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Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
Nanocomposite coatings have been extensively used in the manufacture of automotive components to protect against corrosion of steel structures. The (3-mercaptopropyl) tris[2-(2-methoxyethoxy) ethoxy] silane (MPTMEES) functionalized Cr3C2 was encapsulated with graphene oxide (GO) as an efficient nanofiller in the epoxy matrix (EP). The silanized chromium carbide wrapped in graphene oxide was tested by SEM/EDX and TGA. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) were used to study the protective performance of epoxy coating on steel in the presence of varying weight percentages of graphene oxide wrapped silanized chromium carbide in seawater. After 1 h of immersion, the coating resistance of EP-MPTMEES/Cr3C2 was determined to be over 43% higher than that of pure matrix. After 240 h in seawater, EIS tests revealed that EP-GO/MPTMEES-Cr3C2 nanocomposite coatings had a higher coating resistance (6340 kΩ.cm2) than ordinary epoxy (1.2 kΩ.cm2) coatings. Because of the coated substrate’s improved resistance to anodic dissipation, the least dissipation of ferrous ions was found at the crack of the EP-GO/MPTMEES-Cr3C2 nanocomposite coated steel specimen (1.5 I/nA). The silanized Cr3C2 was reinforced in the degradation products, forming an excellent passive layer at the coating/steel contact, according to FE-SEM/EDX analysis. The newly developed EP-GO/MPTMEES-Cr3C2 nanocomposite coating had improved corrosion protection and enhanced hydrophobic characteristics (WCA: 146°), according to the findings. The epoxy matrix with graphene oxide wrapped silanized chromium carbide demonstrated improved adhesive capabilities. |
Note de contenu : |
- MATERIALS AND METHODS : Materials - Synthesis of GO anchored MPTMEES-Cr3C2 and EP-GO/MPTMEES-Cr3C nanocomposite - Characterization of GO/MPTMEES-Cr3C2 - Electrochemical investigation of coated specimen - Surface morphological studies - Mechanical properties
- RESULTS AND DISCUSSION : Characterization of functionalized of Cr3C nanoparticles - Electrochemical investigation - XRD analysis - Water repellent properties - Mechanical properties - Proposed mechanism
- Table 1 : The fitted results of EIS using equivalent circuit
- Table 2 : Results of potentiodynamic polarization measurements
- Table 3 : Mechanical properties of the nanocomposite films before and after immersion in several hours in natural seawater |
DOI : |
https://doi.org/10.1007/s11998-022-00643-9 |
En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-022-00643-9.pdf?pdf=button% [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38492 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 6 (11/2022) . - p. 1713-1730