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15. Aug 2019 | Application Areas

Effect of inhibitor-loaded halloysite nanotubes on corrosion protection

Recently, researchers investigated the effect of inhibitor-loaded halloysite nanotubes on active corrosion protection of polybenzoxazine coatings on mild steel.

Grid on the floor of a construction site.

The researchers dealed with the improvement of a polybenzoxazine coating for active corrosion protection of mild steel. Source: pitb_1 – stock.adobe.com.

The inhibitor-loaded halloysite nanotubes (HNT) were incorporated into polybenzoxazine coating for active corrosion protection of carbon steel. The morphology and structure of HNT nanocontainers were characterised by field emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), and Fourier transform infrared (FTIR) spectroscopy, respectively. The amount of benzotriazole (BTA) loaded in the lumen of HNT was determined by thermogravimetric analysis (TGA). The release behaviour of inhibitors was characterised by UV–vis spectrometry.

Improved anti-corrosion performance with halloysite nanotubes

It is found that the HNT possessed an acid-responsive release property of BTA. The corrosion resistance performance of polybenzoxazine coatings doped with inhibitor-loaded halloysite nanotubes was investigated by the electrochemical impedance spectroscopy (EIS) measurement and scratch test. The results demonstrated that the anti-corrosion performance of polybenzoxazine coatings was effectively improved by doping with these inhibitor-loaded halloysite nanotubes.

The study is published in: Progress in Organic Coatings Volume 134, September 2019, Pages 126-133.

EC Library Anticorrosive Coatings

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Anticorrosive Coatings

This book brings together all the disciplines involved in the creation and use of corrosion protection coatings for metals. It presents the latest insights into the quality and chemistry of surfaces, the proper way to prepare them by conversion treatment, the function of resins and anticorrosion pigments in paints, and novel concepts in corrosion protection. As an added bonus, all the standards and directives mentioned in the text are grouped together in their own chapter for a better overview.

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