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Application of Inhibitor-Loaded Halloysite Nanotubes in Active Anti-Corrosive Coatings

机译：抑制剂负载的埃洛石纳米管在活性防腐涂料中的应用

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Halloysite particles are aluminum-silicate hollow cylinders with a length of 0.5-1 μm, an outer diameter of ca. 50 nm and a lumen of 15 nm. These nanotubes are used for loading and sustained release of corrosion inhibitors. The inhibitor is kept inside the particles infinitely long under dry conditions. Here, halloysite nanotubes filled with anticorrosive agents are embedded into a SiO_x-ZrO_x hybrid film. An aluminum plate is dip-coated and immersed into 0.1 m sodium chloride aqueous solution for corrosion tests. A defect in the sol-gel coating induces pitting corrosion on the metal accompanied by a strong anodic activity. The inhibitor is released within one hour from halloysite nanotubes at corrosion spots and suppresses the corrosion process. The anodic activity is successfully restrained and the protection remains for a long time period of immersion in NaCI water solution. The self-healing effect of the sol-gel coating doped with inhibitor-loaded halloysite nanotubes is demonstrated in situ via scanning vibrating electrode technique measurements.
机译：埃洛石颗粒是硅酸铝空心圆柱体，其长度为0.5-1μm，外径为。 50 nm和15 nm的流明。这些纳米管用于加载和缓释腐蚀抑制剂。在干燥条件下，抑制剂可无限长地保持在颗粒内部。在此，填充有防腐剂的埃洛石纳米管被嵌入SiO_x-ZrO_x杂化膜中。将铝板浸涂并浸入0.1 m氯化钠水溶液中以进行腐蚀测试。溶胶-凝胶涂层中的缺陷会在金属上产生点蚀，并伴随着强烈的阳极活性。该抑制剂在一小时内从腐蚀部位的埃洛石纳米管中释放出来，并抑制腐蚀过程。阳极活性被成功抑制，并且保护作用可以长时间浸泡在NaCl水溶液中。掺杂有抑制剂的埃洛石纳米管的溶胶-凝胶涂层的自修复作用通过扫描振动电极技术测量就地证实。

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  • 来源
    《Advanced Functional Materials》 |2009年第11期|1720-1727|共8页
  • 作者

    Dmitri Fix; Daria V. Andreeva; Yuri M. Lvov; Dmitry C. Shchukin; Helmuth Moehwald;

  • 作者单位

    Max-Planck Institute of Colloids and Interfaces 14424 Potsdam (Germany);

    Max-Planck Institute of Colloids and Interfaces 14424 Potsdam (Germany);

    Institute for Micromanufacturing Louisiana Tech University Ruston, LA 71272 (USA);

    Max-Planck Institute of Colloids and Interfaces 14424 Potsdam (Germany);

    Max-Planck Institute of Colloids and Interfaces 14424 Potsdam (Germany);

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