Polyoxometalate Ionic Liquids as Self-Repairing Acid-Resistant Corrosion Protection
Polyoxometalate Ionic Liquids as Self-Repairing Acid-Resistant Corrosion Protection
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DOI：
10.1002/anie.201408171
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发表时间：
2014-12-01
影响因子：
16.6
通讯作者：
Streb, Carsten
中科院分区：
文献类型：
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作者：
Herrmann, Sven;Kostrzewa, Monika;Streb, Carsten
对于任何金属结构或材料来说，腐蚀都是一个全球性问题。在此，我们展示了如何使用疏水性多金属氧酸盐基离子液体（POM-IL）轻松保护金属免受酸腐蚀。铜金属盘上涂有由过渡金属功能化 Keggin 阴离子 [SiW11O39TM-( H2O)](n-) (TM-Cu-II, Fe-III) 和季烷基铵阳离子 (CnH2n+1)4(N+) (n= 7-8) 组成的室温 POM-IL。与商业离子液体或固体多金属氧酸盐涂料相比，对乙酸蒸汽和模拟“酸雨”的耐腐蚀性显着提高。 POM-IL 涂层的机械损坏可在不到一分钟的时间内自我修复，并完全保留酸防护性能。通过用有机溶剂冲洗，可以轻松去除和恢复涂层。
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.