| Titre : |
Evaluation of siliconized epoxy coatings by electrochemical impedance spectroscopy |
| Type de document : |
texte imprimé |
| Auteurs : |
S. Ananda Kumar, Auteur ; M. Alagar, Auteur ; K. P. O. Mahesh, Auteur ; T. S. N. Sankara Narayanan, Auteur ; V. Mohan, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 64-77 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Solvent free siloxane modified epoxy coatings were developed by interpenetrating technique. The corrosion resistant behaviour of siliconized epoxy coating systems with 25% zinc powder cured with four different curatives has been investigated by Electrochemical Impedance Spectroscopy (EIS). The results are comparable with those obtained from neutral salt spray tests. The siloxane (10%) modified epoxy coating system A with 25% zinc powder cured by hexamethylene diamine offers maximum corrosion protection to steel surface. |
| Note de contenu : |
- Preparation of siloxane modified epoxy coating system
- Preparation of prepolymer mix
- Siloxane introduction into epoxy coating system
- Electrode preparation
- Impedance measurements
- Formation of a low frequency diffusion tail confirms that the corrosion process is a diffusion controlled reaction
- The resistance and the capacitance values of coating systems A, B, C and D are in the range of 10^9 ohm.cm² and 10^-10 F
- Better corrosion protection of steel surfaces
- The Bode plot can be explained with the help of threshold frequency limits and the variation of logarithmic values of impedance with frequency
- The data analysis of the coating systems A,B,C, and D confirms the existence of a single constant |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10994 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4/00 (04/2000) . - p. 64-77
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Evaluation of siliconized epoxy coatings by electrochemical impedance spectroscopy in EUROPEAN COATINGS JOURNAL (ECJ), N° 4/00 (04/2000)
