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Anticorrosive behavior of a zinc-rich epoxy coating containing sulfonated polyaniline in 3.5% NaCl solution
- Yang, Feng, Liu, Tong, Li, Jingyu, Qiu, Shihui, Zhao, Haichao
- RSC advances 2018 v.8 no.24 pp. 13237-13247
- X-ray diffraction, adhesion, coatings, corrosion, dielectric spectroscopy, electrodes, epoxides, nanofibers, polymers, sodium chloride
- An epoxy zinc-rich composite coating containing self-doped conducting sulfonated polyaniline (SPANi) nanofiber was prepared and the corrosion resistance of as-prepared coatings on Q235 substrate studied by open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET). Results suggested that a zinc-rich coating with addition of 1.0 wt% SPANi could enhance the cathodic protection time and barrier performance. To study corrosion diffusion, artificial scratch and adhesion strength were investigated via the salt spray test and pull-off test, respectively. Finally, the passivating action of coatings was demonstrated by analyses of corrosion products via X-ray diffraction spectroscopy.