Cu-MBT@HNTs/epoxy self-healing coating was fabricated by using epoxy resin and Cu-MBT@HNTs nanocomposite inhibitor, which composed by halloysite nanotubes (HNTs) with containing 2-mercaptobenzothiazole (MBT) and Cu-MBT encapsulated end stopper. The surface morphology, static contact angle and adhesion force of Cu-MBT@HNTs/epoxy coating were observed and detemined by optical microscopy, static contact angle and pull-off adhesion tester, and the release behavior of MBT from Cu-MBT@HNTs was determined by UV–Vis spectrophotometer. The corrosion and self-healing behavior of Cu-MBT@HNTs/epoxy coating in 3.5% NaCl solution was evaluated by electrochemical impedance spectroscopy (EIS) technique. The experimental results show that MBT is successfully loaded into HNTs with a loading capacity of 12.3(wt.) %, and the formation of Cu-MBT end stopper could reduce the release rate of MBT in water especially in the acidic and neutral water. The prepared Cu-MBT@HNTs/epoxy coating has a smoother morphology, larger static contact angle and higher adhesion force than that of MBT@HNTs/epoxy coating. With the addition of Cu-MBT@HNTs, the scratched Cu-MBT@HNTs/epoxy coating has a higher polarization resistance and a better self-healing performance than that of blank epoxy coating and MBT@HNTs/epoxy coating, which resulted from the release of MBT inhibitor from HNTs by the local alkaline condition and the formation of Fe-MBT inhibition film on the scratched area of steel substrate.

利用环氧树脂和Cu2-MBT @ HNTs纳米复合抑制剂制备了Cu-MBT @ HNTs /环氧自修复涂层。Cu-MBT@ HNTs纳米复合抑制剂由含2-巯基苯并噻唑（MBT）和Cu-MBT包封的封端剂的埃洛石纳米管（HNT）组成。用光学显微镜，静态接触角和拉拔附着力测试仪对Cu-MBT @ HNTs /环氧树脂涂层的表面形貌，静态接触角和附着力进行了测定，确定了MBT从Cu-MBT @ HNTs中的释放行为。由紫外可见分光光度计测定。通过电化学阻抗谱（EIS）技术评估了Cu-MBT @ HNTs /环氧树脂涂层在3.5％NaCl溶液中的腐蚀和自修复行为。实验结果表明，MBT已成功装载到HNT中，装载量为12.3（wt。）％，Cu-MBT端塞的形成会降低MBT在水中的释放速率，特别是在酸性和中性水中。所制备的Cu-MBT @ HNTs /环氧树脂涂层比MBT @ HNTs /环氧树脂涂层具有更光滑的形态，更大的静态接触角和更高的附着力。通过添加Cu-MBT @ HNTs，比起空白的环氧涂层和MBT @ HNTs /环氧树脂涂层，刮擦的Cu-MBT @ HNTs /环氧树脂涂层具有更高的抗极化性和更好的自修复性能。通过局部碱性条件从HNTs中释放MBT抑制剂，并在钢基底的划痕区域形成Fe-MBT抑制膜。与MBT @ HNTs /环氧涂料相比，静电接触角更大，附着力更高。通过添加Cu-MBT @ HNTs，比起空白的环氧涂层和MBT @ HNTs /环氧树脂涂层，刮擦的Cu-MBT @ HNTs /环氧树脂涂层具有更高的抗极化性和更好的自修复性能。通过局部碱性条件从HNTs中释放MBT抑制剂，并在钢基底的划痕区域形成Fe-MBT抑制膜。与MBT @ HNTs /环氧涂料相比，静电接触角更大，附着力更高。通过添加Cu-MBT @ HNTs，比起空白的环氧涂层和MBT @ HNTs /环氧树脂涂层，刮擦的Cu-MBT @ HNTs /环氧树脂涂层具有更高的抗极化性和更好的自修复性能。通过局部碱性条件从HNTs中释放MBT抑制剂，并在钢基底的划痕区域形成Fe-MBT抑制膜。