Polydimethylsiloxane-titania nanocomposite coating: Fabrication and corrosion resistance

Titania (TiO2) nanoparticles were added to polydimethylsiloxane (PDMS) matrix to form nanocomposite coating via spin coating method on the AA 2024 (one of the aluminum alloys) to improve the anticorrosion ability of metal. The microstructures of the PDMS/TiO2 composite coating were detected by scann...

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Bibliographic Details
Published in:Polymer (Guilford) 2018-02, Vol.138, p.203-210
Main Authors: Cui, Xiaokun, Zhu, Guiyu, Pan, Yufeng, Shao, Qian, Zhao, Cindy (xinxin), Dong, Mengyao, Zhang, Yue, Guo, Zhanhu
Format: Article
Language:English
Subjects:
Aluminum base alloys
Coating effects
Coatings
Composite coatings
Corrosion
Corrosion currents
Corrosion prevention
Corrosion resistance
Electrochemistry
Electron microscopy
Fabrication
Fillers
Fourier transforms
Immersion
Nanocomposites
Nanoparticles
PDMS/TiO2
Polydimethylsiloxane
Protective coatings
Scanning electron microscopy
Silicone resins
Spectrometry
Spin coating
Titanium dioxide
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Summary:Titania (TiO2) nanoparticles were added to polydimethylsiloxane (PDMS) matrix to form nanocomposite coating via spin coating method on the AA 2024 (one of the aluminum alloys) to improve the anticorrosion ability of metal. The microstructures of the PDMS/TiO2 composite coating were detected by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectrometry to verify the structure of composite coating. The corrosion properties of PDMS/TiO2 composite coating was evaluated by the electrochemical tests. The results showed that the anticorrosion ability of the composite coating has been significantly affected by the TiO2 content. For example, the impedance modulus value reached 106 Ωcm2 of the composite coating with 8 wt % nano-TiO2 fillers. Meanwhile, the corrosion current density (Icorr) of the coating was smaller than that of bare aluminum. The long term immersion experiments of coating were performed and the results demonstrated that the coating still had a protective effect on aluminum after 40 days of immersion. [Display omitted] •Nano titania improved the anticorrosion performance of the polymer coating.•The titania content influenced the corrosion resistance.•Long-term anti-corrosion was demonstrated with PDMS nanocomposite coating.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2018.01.063