Comparison study on anticorrosion performances of the epoxy coatings with two different nano‐polyanilines for Q235 steel |
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| Authors: | W P Hou Y Liu Z Y Ge W Y Zhao |
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| Affiliation: | 1. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, No. 519 Zhuangshi Road Zhenhai District Ningbo City Zhejiang Province 315201 (P. R. China);2. Institution of Material Science and Engineering, Ocean University of China, Qingdao 266100 (P. R. China) |
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| Abstract: | Sulfuric acid doped nano‐polyaniline was prepared by direct mixed oxidation in two different systems. A novel approach for preparing polyaniline (PANI) in FeCl2/H2O2 system was developed. The PANI possessed an excellent dispensability. Corrosion protection of epoxy coatings containing two kinds of polyaniline (PANI) on Q235 steel was studied by electrochemical impendance spectroscopy (EIS) technique and Tafel polarization test in 3.5 wt% sodium chloride (NaCl) aqueous solution. The results indicated that the epoxy coating containing PANI obtained in FeCl2/H2O2 system had the best performance of the corrosion protection among three systems under investigation. The possible protective mechanism of PANI was discussed. |
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| Keywords: | anticorrosion coating EIS polyaniline steel |
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