| Titre : |
Parametric study on the electrochemical impedance spectroscopy of organic-coated steels in hydrochloric acid solutions |
| Type de document : |
texte imprimé |
| Auteurs : |
K.-M. Yin, Auteur ; L. I. Lu, Auteur |
| Année de publication : |
2003 |
| Article en page(s) : |
p. 65-72 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Tags : |
Feuil Peinture anticorrosion Corrosion Chlorhydrique acide eau Epoxyde résine Protection corrosion Acier Méthode électrochimique |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Electrochemical impedance technique was used to study the corrosion resistance of polymer-coated steels in hydrochloric acid solutions. The mechanism of the degradation process of the coating can be described using a Randles-type equivalent circuit model with the inclusion of Warburg diffusion impedance. The impedance parameters: coating resistance Rpo, coating capacitance Cc, charge transfer resistance Rct and double layer capacitance Cdl of the metal/coating interface, and the Warburg coefficient ?were calculated using a nonlinear least-square minimization scheme. The time dependency of impedance parameters was compared to the method of breakpoint frequency. It was found that the delamination of the metal/coating interface is more associated with the charge transfer resistance than the coating resistance. Open circuit potential measurement is indicative of the corrosion status of the coating. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5583 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 75, N° 941 (06/2003) . - p. 65-72
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