Abstract
A strategy is proposed to construct stimuli-responsive halloysite nanotubes (HNTs) inhibitor containers in this study. After the benzotriazole (BTA) corrosion inhibitor was loaded into the etched nanotubes (EHNTs), insoluble Zn-BTA complexes as plugs are formed at both ends of the nanotubes by the interaction of BTA with Zn2+ ions (Zn-BTA@EHNTs). The nanocontainers exhibit good pH-sensitivity. At the lowered pH, the extraction of BTA from the nanocontainers is rapid. By contrast, at the neutral pH, the release rate of BTA is relatively slow. Through the electrochemical measurements for the scribed coatings, it is demonstrated that the Zn-BTA@EHNTs-incorporated epoxy coating exhibits distinct stimuli-responsive behavior. And the incorporation of the Zn-BTA@EHNTs remarkably improves the corrosion resistance of the epoxy coating.
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