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Corrosion protection mechanisms of carbon steel by an epoxy resin containing indole-3 butyric acid modified clay

Hang, To Thi Xuan and Truc, Trinh Anh and Olivier, Marie-Georges and Vandermiers, Catherine and Guérit, Nathalie and Pébère, Nadine Corrosion protection mechanisms of carbon steel by an epoxy resin containing indole-3 butyric acid modified clay. (2010) Progress in Organic Coatings, 69 (4). 410-416. ISSN 0300-9440

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.porgcoat.2010.08.004


This work is an extension of studies into the mechanisms of corrosion protection of mild steel by an epoxy resin containing organically modified clay (Hang et al. [1]; Truc et al. [2]). In a previous study (Truc et al. [2]), it was shown that indole-3 butyric acid (IBA)-modified clay improved the corrosion performance of epoxy. In the present study, it was shown that the IBA is an anodic inhibitor and its efficiency was about 93%. Exfoliation and dispersion of the IBA-modified clay in the epoxy coating were checked by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The improvement of the corrosion performance of the epoxy coating containing IBA-modified clay by comparison with pure epoxy coating was confirmed for a low film thickness (10 μm). Local electrochemical impedance measurements performed on scratched samples revealed the inhibitive action of IBA at the carbon steel/coating interface. It was shown that the inhibitor release from the IBA-modified clay was favoured for high pH values. Thus, in neutral media, the corrosion process which induces a local increase of pH will increase the self-healing performance.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Progress in Organic Coatings website: http://www.sciencedirect.com/science/journal/03009440
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Mons - UMONS (BELGIUM)
Other partners > Vietnam Academy of Science and Technology - VAST (VIETNAM)
Laboratory name:
Deposited On:04 May 2011 10:53

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