| Titre : |
Improved corrosion protection of acrylic waterborne coating by doping with microencapsulated corrosion inhibitors |
| Type de document : |
texte imprimé |
| Auteurs : |
Jacob Ress, Auteur ; Ulises Martin, Auteur ; M. Bastidas, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 39-44 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Acier au carbone
Anticorrosifs
Anticorrosion
Chlorures
Emulsions multiples
Encapsulation
Métaux -- Revêtements protecteurs
Polyacryliques
Revêtements en phase aqueuse:Peinture en phase aqueuse
Spectroscopie d'impédance électrochimique
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A waterborne acrylic coating doped with pH sensitive colophony microcapsules containing corrosion inhibitors was studied on carbon steel plates. The changes in the physical properties of the coatings were studied. The microcapsule coating specimens maintained more noble E.„ values compared to the control in deionised water and simulated concrete pore solutions with -513 and -531 mVSCE, respectively. Additionally, the microcapsule polarisation results for both pH12.6 and 6.2 electrolyte solutions showed lowerieO values of 1.20 x 10-' and 3.24 x 10-6 A . cm', respectively, compared to the control sample (1.15 x 10-5 and 4.21 x 10-5 A . cm2). Therefore, the microcapsule coating provided more protection from chloride attack on the substrate as well as the deleterious effects of low pH on carbon steel. The electrochemical impedance spectroscopy analysis corroborated the DC polarisation results, showing increased corrosion resistance for the microcapsule coated specimens compared to the control. Moreover, the Rpore and Ra are much higher than the control, indicating the protection of the inhibitors. The Ced, also shows lower values for the microcapsule coating than the control, showing a more protective and less doped double layer. |
| Note de contenu : |
- Table 1 : The composition of carbon steel speciment (wt%)
- Table 2 : Composition of waterborne acrylic coating (wt%)
- Table 3 : Electrochemical parameters calculated by Tafel fitting from potentiodynamic polarisation for acrylic coating containing microcapsules exposed to 3.5 wt°/0NaCl contaminated environment in DI water (pH 6.8) and SCPS (pH 12.6). The standard deviation
is presented in the parenthesis
- Table 4 : EIS fitting values obtained for acrylic coated control steel panels and MC modified acrylic coated panels exposed to 3.5 wt% NaCI contaminated environment in DI water (pH 6.8) and SCPS (pH 12.6) using the equivalent circuit presented in Figure 8. The standard deviation is presented in the parenthesis |
| En ligne : |
https://drive.google.com/file/d/1InjEH6A4EGq-s7P6M0KuLbo8bkkKI446/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36973 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4673 (02/2022) . - p. 39-44
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