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Layered double hydroxides as containers of inhibitors in organic coatings for corrosion protection of carbon steel

Hang, To Thi Xuan and Truc, Trinh Anh and Duong, Nguyen Thuy and Pébère, Nadine and Olivier, Marie-Georges Layered double hydroxides as containers of inhibitors in organic coatings for corrosion protection of carbon steel. (2012) Progress in Organic Coatings, 74 (2). 343-348. ISSN 0300-9440

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Official URL: http://dx.doi.org/10.1016/j.porgcoat.2011.10.020

Abstract

The present work focuses on the use of layered double hydroxides (LDH) as containers for corrosion inhibitors in an epoxy coating. 2-Benzothiazolylthio-succinic acid (BTSA), used as corrosion inhibitor, was intercalated by co-precipitation in magnesium-aluminum layered double hydroxides. The obtained LDH-BTSA was characterized by infrared spectroscopy, X-ray diffraction and scanning electron microscopy. BTSA release from LDH-BTSA in NaCl solutions was investigated by UV-vis spectroscopy. The inhibitive action of LDH-BTSA on carbon steel corrosion was characterized by electrochemical methods and the protective properties of an epoxy coating containing LDH-BTSA were evaluated by electrochemical impedance spectroscopy. It was shown that the BTSA was intercalated in the layered double hydroxide and its loading was about 33%. The BTSA release was dependent on the NaCl concentration in the electrolyte. The polarization curves obtained on the carbon steel sample showed that the LDH-BTSA is an anodic inhibitor. Its efficiency was about 90% at a concentration of 3 g/l. The impedance results showed that the incorporation of LDH-BTSA (3%) in the epoxy matrix improved the corrosion protection of the carbon steel.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF can be found at Progress in Organic Coatings website: http://www.sciencedirect.com/science/article/pii/S0300944011003420
HAL Id:hal-00864273
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 - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Mons - UMONS (BELGIUM)
Other partners > Vietnam Academy of Science and Technology - VAST (VIETNAM)
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Deposited By: cirimat webmestre
Deposited On:20 Sep 2013 14:39

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