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| Preparation and Corrosion Resistance of Water-based Coatings Modified by Graphene Oxide-Polyaniline-Silica Nano-composite |
| Received:October 11, 2019 Revised:November 29, 2019 |
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| DOI：10.7643/issn.1672-9242.2020.04.017 |
| KeyWord:graphene oxide polyaniline silicon dioxide water-based coating modified corrosion resistance |
| Author | Institution |
| YANG Ning |
Institute of Oceanology, Chinese Academy of Sciences, Qingdao , China;University of Chinese Academy of Science, Beijing, , China |
| FAN Wei-jie |
Institute of Oceanology, Chinese Academy of Sciences, Qingdao , China;University of Chinese Academy of Science, Beijing, , China;Qingdao Campus of Naval Aviation University, Qingdao , China |
| LI Wei-hua |
Sun Yat-sen University, Zhuhai , China |
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| Abstract: |
| This work aims to prepare the three-dimensional silica-polyaniline-graphene oxide (SiO2-PANI-GO) composite and add it into water-based alkyd varnish (WAV) to enhance the corrosion protection ability.The SiO2-PANI-GO composite were prepared by a facile chemical method. The composites were characterized by SEM, FT-IR and XRD. The nano composite was added to the water-based coating as filler at the mass ratio of 1%. The anticorrosion performance of WAV and composite introduced WAV were demonstrated by electrochemical impedance spectroscopy measurements (EIS) and polarization tests. The SEM image showed that the silica-polyaniline-graphene oxide composite was a lamellar graphene oxide whose surface was combined with fibrous polyaniline and spherical silica; the results of FT-IR and XRD showed that the silica-polyaniline-graphene oxide was successfully synthesized; the EIS results showed that the anti-corrosion resistance of the modified coating was increased by 2 orders. The best effect was obtained when the ratio of SiO2 to PANI-GO was 1:4. By adding silica-polyaniline-graphene oxide three-dimensional composite into water-based alkyd varnish, the distance and path of the corrosive medium to metal substrate can be increased, so the anti-corrosion resistance of the coating can be effectively improved. |
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