Abstract
The effects of preparation conditions on the synthesis of polyaniline and its anticorrosion performance were investigated using single-factor method. The experimental results showed that the better conditions for electrochemical synthesis of polyaniline films are 0.5 M aniline, 0.8 M H2SO4, range of sweep voltage 1.6 V~-0.3V (Init =-0.3V), sensitivity 1.e-002, sweep segment 8, scan rate 0.1V/s. The anticorrosion performances of polyaniline films were investigated in 5% and 2.5% MgCl2 solutions respectively. Polarization and AC impedance technique tests proved that the polyaniline film owned a better anticorrosion performance to X70 in 2.5% MgCl2 solution than the denser one. And, it was found that polyaniline films adhered to X70 steel exhibited good barrier properties for a prolonged corrosion process. The above results provided some experimental data and theoretical guidance of polyaniline anticorrosion properties for some metals, especially for metals using in oil and natural gas industry.
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