Journal
COMPOSITE INTERFACES
Volume 28, Issue 1, Pages 1-16Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09276440.2020.1733371
Keywords
Halloysite nanotubes; graphene oxide; benzotriazole; smart coating; self-healing
Categories
Funding
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University) [PLN201617]
- Scientific and Technological Innovation Team for the Safety of Petroleum Tubular Goods in Southwest Petroleum University [2018CXTD01]
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A new strategy combining halloysite nanotubes and graphene oxide has been developed to improve the anti-corrosion performance of epoxy coatings, providing both active and passive protection against corrosion. Experimental results show that the new coating system exhibits excellent anti-corrosion performance.
Herein, a new strategy for improving anti-corrosion performance of epoxy coatings has been developed, which combined halloysite nanotubes (HNTs) with graphene oxide (GO). On one hand, the corrosion inhibitors loaded in nanocontainers will be released in the event of a coating damage that will subsequently prevent metal from further corrosion because of the pH-responsive ability of the nanocomposite. On the other hand, GO exerts the physical barrier property to protect metal matrix against corrosive medium. This endows the coating system with both active and passive protection performances. The release behavior of BTA loaded in the lumen of the HNTs was determined by UV-vis, and the dispersity of the composite in epoxy coating was evaluated by SEM. Electrochemical impedance spectroscopy (EIS) confirmed that the BTA@HNTs-GO hybrid composite has an excellent anti-corrosion performance.
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