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

被引：154

作者：

To Thi Xuan Hang ^{[1
]}

Trinh Anh Truc ^{[1
]}

Nguyen Thuy Duong ^{[1
]}

Pebere, Nadine ^{[2
]}

Olivier, Marie-Georges ^{[3
]}

机构：

[1] Vietnam Acad Sci & Technol, Inst Trop Technol, Hanoi, Vietnam

[2] Univ Toulouse, CIRIMAT, UPS INPT CNRS, ENSIACET, F-31030 Toulouse 4, France

[3] Univ Mons UMONS, Fac Polytech, Serv Sci Mat, Mons, Belgium

来源：

PROGRESS IN ORGANIC COATINGS | 2012年 / 74卷 / 02期

关键词：

Organic coatings; Layered double hydroxides; Corrosion inhibitors; Release; FILIFORM CORROSION; COATED AA2024-T3; ANIONIC CLAYS; EPOXY-RESIN; EIS; PERFORMANCE; METALS; ALLOY;

D O I：

10.1016/j.porgcoat.2011.10.020

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

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. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：343 / 348

页数：6

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