期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 377, 期 -, 页码 142-151出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.05.063
关键词
Polydopamine; Polyaniline; Graphene oxide; Alkyd varnish; Electrochemical measurements; Corrosion resistance
资金
- National Science Fund for Distinguished Young Scholars [51525903]
- AoShan Talents Cultivation Program - Qingdao National Laboratory for Marine Science and Technology [2017ASTCP-OS09]
- Applied Basic Research Programs of Qingdao [17-1-1-98-jch]
- Applied Basic Research Programs of Nantong [GY12016002]
- National Science Fund for Young Scholars [51701234]
- Key research and development project of shandong province [2017GGX20101]
In this study, the composite of two-dimensional graphene oxide (GO) nanosheets and button-shaped polyaniline (PANT) was synthesized and further modified by polydopamine (PDA). The obtained PDA-PANI-GO composite was used to enhance the corrosion protection ability of nontoxic water-based alkyd varnish (WAV). The chemical composition, functional groups and surface morphologies of GO, PANI-GO and PDA-PANI-GO composites were characterized by XRD, FT-IR XPS and SEM. The anticorrosion performance was demonstrated by electrochemical impedance spectroscopy measurements and polarization tests. Due to the physical barrier effects and surface hydrophobicity of PANI-GO composite, the approaches of the caustic substances to the surface of the metal was inhibited, while the highly adhesive PDA molecules reinforced compatibility between fillers and WAV. As results, PDA-PANI-GO composite introduced WAV enhanced corrosion prevention performance. Under the optimal conditions, where the ratio of PDA to PANI-GO was kept at 2:1, the impedance values increased by over two orders of magnitude compared with bare steel.
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