It is clear from the above results that the corrosion rate was
reduced if the volume concentration of the conductive polyaniline
compound in the organic coating formula is kept appropriately
low, while the corrosion rate increased with increasing PVC after
exceeding a pigment concentration limit, usually PVC = 10%. The
pigment volume concentration was not the sole parameter affecting
the organic coating’s anticorrosion efficiency. The type of
dopant present in the conductive polyaniline compound played
an important part as well. Among the organic coatings tested, the
organic coating with PANI-HCl at PVC = 0.5% and 1% exhibited the
lowest corrosion rate, followed by the organic coating with PANIPTSA
at PVC = 0.1%.