Novel Inorganic Host Layered Double Hydroxides Intercalated with Guest Organic Inhibitors for Anticorrosion Applications

被引：260

作者：

Poznyak, S. K. ^{[1
]}

Tedim, J. ^{[1
]}

Rodrigues, L. M. ^{[1
,2
]}

Salak, A. N. ^{[1
]}

Zheludkevich, M. L. ^{[1
]}

Dick, L. F. P. ^{[2
]}

Ferreira, M. G. S. ^{[1
,3
]}

机构：

[1] Univ Aveiro, Dept Ceram & Glass Engn, CICECO, P-3810193 Aveiro, Portugal

[2] Univ Fed Rio Grande do Sul, BR-9004006 Porto Alegre, RS, Brazil

[3] Univ Tecn Lisboa, IST, ICEMS, P-1049001 Lisbon, Portugal

来源：

ACS APPLIED MATERIALS & INTERFACES | 2009年 / 1卷 / 10期

关键词：

layered double hydroxides; organic inhibitors; corrosion; nanocontainer; aluminum alloy; ACTIVE CORROSION PROTECTION; FILIFORM CORROSION; COATED AA2024-T3; HYDROTALCITE; COATINGS; RELEASE; ALLOY; RESISTANCE; PIGMENTS; EPOXY;

D O I：

10.1021/am900495r

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Zn-Al and Mg-Al layered double hydroxides (LDHs) loaded with quinaldate and 2-mercaptobenzothiazolate anions were synthesized via anion-exchange reaction The resulting compounds were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy/energy-dispersive X-ray spectroscopy. Spectrophotometric measurements demonstrated chat the release of organic anions from these LDHs into the bulk solution is triggered by the presence of chloride anions, evidencing the anion-exchange nature of this process. The anticorrosion capabilities of LDHs loaded with organic inhibitors toward the AA2024 aluminum alloy were analyzed by electrochemical impedance spectroscopy. A significant reduction of the corrosion race is observed when the LDH nanopigments are present in the corrosive media. The mechanism by which the inhibiting anions can be released from the LDHs underlines the versatility of these environmentally friendly structures and their potential application as nanocontainers in self-healing coatings

引用

页码：2353 / 2362

页数：10

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