[article]
| Titre : |
Exploration of high corrosion resistance property of less hazardous pyrazolidine-based benzoxazines in comparison with bisphenol-F derivatives |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Manoj, Auteur ; A. Kumaravel, Auteur ; R. Mangalam, Auteur ; P. Prabunathan, Auteur ; A. Hariharan, Auteur ; M. Alagar, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 921-935 |
| 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.
Analyse toxicologique
Anticorrosion
Caractérisation
Métaux -- Revêtements protecteurs
Polybenzoxazine
Polymères -- Propriétés thermiques
Pyrazolidine bisphénol
Revêtements organiques
Spectroscopie d'impédance électrochimique
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The present work describes the design of nontoxic pyrazolidine bisphenol (PYBP)-based hydrophobic benzoxazine (PBz) matrices, in comparison with that of bisphenol-F-based benzoxazines, and investigates their efficiency toward corrosion protection on mild steel surfaces. The preliminary in vitro toxicity assay studies infer the nontoxic nature of PYBP. Data obtained from thermal and surface studies indicate that the PYBP-based PBzs possess higher thermal stability than those of bisphenol-F benzoxazines. Observations from SEM images suggest that the inherent hydrophobic nature was due to the formation of rough surfaces. The corrosion studies of the specimens were carried out using open-circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization. Among the mild steel specimens, coated with different benzoxazines, the poly(PYBP-oda)-coated specimen was found to be less aggressive toward corrosion showing 90% efficiency and charge transfer resistance (Rct) of 381 kΩ cm2. Thus, data obtained from different studies suggest that the PYBP-based benzoxazines can be used as a better coating material for steel and steel products against corrosion. |
| Note de contenu : |
- EXPERIMENTAL : Chemicals - Synthesis of 1-(3,5-bis(4-hydroxyphenyl)-4, 5-dihydro-1H-pyrazol-1-yl)ethanone or pyrazolidine bisphenol (PYBP) - Preparation of pyrazolidine-bisphenol-based benzoxazine monomer (PYBP-dda, PYBP-oda, PYBP-fa) - - Synthesis of bisphenol-F-based benzoxazine monomer (BF-dda), BF-oda, BF-fa) - Preparation of benzoxazine-coated mild steel - Preparation of the coatings - Characterization
- RESULTS AND DISCUSSION : Toxicity studies - Curing behavior of benzoxazines - Thermal behavior - Morphological properties of polybenzoxazines - Morphological properties of polybenzoxazine-coated mild steel - Electrochemical studies of the coated and uncoated mild steel specimens : open-circuit potential (Eocp) analysis - Polarization and electrochemical impedance studies of coated and uncoated mild steel specimens |
| DOI : |
https://doi.org/10.1007/s11998-019-00312-4 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-019-00312-4.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34381 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 4 (07/2020) . - p. 921-935
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Exploration of high corrosion resistance property of less hazardous pyrazolidine-based benzoxazines in comparison with bisphenol-F derivatives in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)
