Polyoxometalate Ionic Liquids as Self-Repairing Acid-Resistant Corrosion Protection

被引：95

作者：

Herrmann, Sven ^{[1
,2
]}

Kostrzewa, Monika ^{[3
]}

Wierschem, Andreas ^{[3
]}

Streb, Carsten ^{[1
,2
]}

机构：

[1] Univ Ulm, Inst Anorgan Chem 1, D-89081 Ulm, Germany

[2] Univ Erlangen Nurnberg, D-91058 Erlangen, Germany

[3] Univ Erlangen Nurnberg, Inst Stromungsmech, D-91058 Erlangen, Germany

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2014年 / 53卷 / 49期

关键词：

corrosion; ionic liquid; metal oxides; polyoxometalate; self-assembly; NONPOLAR-SOLVENTS; CHEMISTRY; HETEROPOLYANIONS;

D O I：

10.1002/anie.201408171

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Corrosion is a global problem for any metallic structure or material. Herein we show how metals can easily be protected against acid corrosion using hydrophobic polyoxometalate- based ionic liquids (POM-ILs). Copper metal disks were coated with room-temperature POM-ILs composed of transition-metal functionalized Keggin anions [SiW11O39TM-( H2O)](n-) (TM-Cu-II, Fe-III) and quaternary alkylammonium cations (CnH2n+1)4(N+) (n= 7-8). The corrosion resistance against acetic acid vapors and simulated "acid rain" was significantly improved compared with commercial ionic liquids or solid polyoxometalate coatings. Mechanical damage to the POM-IL coating is self-repaired in less than one minute with full retention of the acid protection properties. The coating can easily be removed and recovered by rinsing with organic solvents.

引用

页码：13596 / 13599

页数：4

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