Preparation Of Polypyrrole/Poly(N-Methylpyrrole)/Nano-Zno Composite And Its Anticorrosive Performance

In the presence of iron trichloride as oxidant and the p-toluenesulfonic acid as dopant, the polypyrrole/poly(N-methylpyrrole)/nano-ZnO, the polypyrrole/nano-ZnO, the polypyrrole/poly(N-methylpyrrole), the poly(N-methylpyrrole) and polypyrrole composites were prepared. The morphology and structure of composite was characterized by scaning electron microscopy, X-ray pattern, UV-vis and FT-IR spectra. The carbon steel was coated polyurethane with respectively adding five kinds of composites as filler, and was soaked in mass fraction of 3.5% NaCl solution, the anticorrosive performance of coating was researched with the Open Circuit Potential, the Polarization Curve, the Electrochemical Impedance Spectroscopy and the immersion test. The results show that the anticorrosive performance of the plolyurethane/polypyrrole/poly(N-methylpyrrole)/nano-ZnO hybrid coating was optimum, in that the open circuit potential values was maximum, the corrosion current densites and rate was minimum.