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Preparation and Corrosion Properties of Polyaniline Doped with Copper Phthalocyanine Disulfonic Acid |
Xiaobao LI,Li XU,Yihong LIU,Ting LIAO,Mingtian LI( ),Xuejun CUI |
Key Laboratory of Material Corrosion and Protection of Sichuan Province, College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000,China |
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Abstract The copper phthalocyanine disulfonic acid CuPc-(SO3H)2 (CuPANI) was prepared with direct fast turquoise blue GL as raw material, and then the CuPANI doped polyaniline was obtained by chemical reaction of eigenstate polyaniline (EBPANI) with CuPc-(SO3H)2 in N,N′-dimethylformamide. The doped polyaniline was characterization by IR, UV-Vis and four point probe. The coatings with EBPANI or CuPANI as filler and epoxy resin 44 (EP-44) and 107 glue as adhesives were prepared on the surface of pretreated steel sheets, while the corrosion behavior of the sheets without and with coatings with EBPANI and CuPANI in 3.5%NaCl solution was investigated by electrochemical methods such as tafel polarization curve measurement, and alternating current impedance spectroscopy, respectively. The results indicated that the CuPANI doped polyaniline coating shows better anticorrosion performance.
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