Improvement ofthe existing materials and developing new ones
which are stronger, lighter, and more resistant to aggressive envi-
ronments attracted much attention. The conductive polymers (CPs)
are still of considerable interest and importance as components
of corrosion-resistant coatings [1–6]. DeBerry reported a change
in the corrosion of stainless steel (SS) of the types 410 and 430
which have been coated with PANI. The corrosion rate of SS is
reduced significantly as a result of a form of anodic protection
provided by the coating [1]. Such anodic protection is due to the
redox states of PANI which are able to maintain the native passive
film on the metal surface. Hermas et al. [2–6] found that, the pas-
sive film of SS under CP layers has different characteristics than
that formed by application of positive potential. However, poros-
ity and anion exchange properties of CPs could be disadvantageous
particularly when it comes to pitting corrosion caused by small
aggressive anions such as chlorides. The protective properties of
CPs are enhanced through blending with polymer binders. This can
be represented by the higher protective properties of PANI-based
composite film containing Prussian blue and hexacyanoferrate against pitting corrosion of SS in chloride-containing acid media
in comparison with bare PANI film according to Galkowski et al.