Zn-Al layered double hydroxides as chloride nanotraps in active protective coatings

被引：250

作者：

Tedim, J. ^{[1
]}

Kuznetsova, A. ^{[1
]}

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

Montemor, F. ^{[2
]}

Snihirova, D. ^{[2
]}

Pilz, M. ^{[3
]}

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

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

机构：

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

[2] Inst Super Tecn, ICEMS, P-1049001 Lisbon, Portugal

[3] SINTEF Mat & Chem, N-0373 Oslo, Norway

来源：

CORROSION SCIENCE | 2012年 / 55卷

关键词：

Organic coatings; X-ray diffraction; HYDROTALCITE-LIKE COMPOUNDS; CORROSION PROTECTION; FILIFORM CORROSION; COATED AA2024-T3; ALUMINUM-ALLOY; INHIBITOR; PIGMENTS; NANOCONTAINERS; RELEASE; ANIONS;

D O I：

10.1016/j.corsci.2011.10.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zn-Al layered double hydroxides (LDHs) intercalated with nitrate anions are suggested as chloride nanotraps for organic polymeric coatings. The addition of such nanotraps to a polymer layer drastically reduces the permeability of corrosive chloride anions through the protective coatings. In solution, Zn(2)-Al-NO3 LDHs are responsive to the concentration of chlorides and the release of nitrates is accompanied by entrapment of chlorides, with the process governed by ion-exchange equilibrium. In particular, a coating modified with LDH-NO3 was found to exhibit significantly lower permeability to chlorides when compared to both unmodified and LDH-Cl-containing coatings, which proves the applicability of LDHs in delaying coating degradation and corrosion initiation. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1 / 4

页数：4

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