Comparison study on anticorrosion performances of the epoxy coatings with two different nano‐polyanilines for Q235 steel
2013
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 3.5wt% 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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