Current corrosion control methods use coatings which are toxic and environmentally hazardous materials, such as, chromium. More work needs to be done to find a substitute that is competitive with current industrial technologies. Many polymeric materials have been tested as possible alternatives to the present systems. These include polysiloxanes, polymer blends based on polymethylmethacrylate/polysiloxanes and co-polymers of these materials.  Oxidized and carbided metal surfaces have been analyzed as chromium substitutes as well.  So far the technology has not advanced to a industrially competitive level. Polyaniline is on of the most promising materials for environmentally safe corrosion control.