ABSTRACT
This chapter discusses how intrinsically conducting polymer (ICP) doping can be utilized in corrosion protection. ICPs contain a double bond in the backbone of their macromolecule which is responsible for their specific properties. ICPs can form a barrier to aggressive ions which penetrate through those pores to a metal surface, therefore slowing down the corrosion. The fundamental property of any dielectric material is the size and structure of its bandgap, the location of energy levels introduced by donor or acceptor impurities, and Fermi level, which in the case of electrochemical equilibrium is called “electrochemical potential”. If ICP concentration is high enough, ICP particles in mechanical contact with each other form the electrical percolation cluster. Physical meaning of ICP is the potential of the free surface, that is, the potential of the surface which is in equilibrium with an electrolyte solution.
