Corrosion protective polyaniline epoxy blend coatings on mild steel

Polyaniline epoxy blend coatings on mild steel have been studied in neutral, acidic and alkaline solutions with various electrochemical methods. It has been found that coatings containing emeraldine base provide better corrosion protection in NaCl solution than coatings based on conducting polyaniline. Good corrosion protection by emeraldine base was observed even when a hole was made to the coating. In HCl solution protonated polyaniline gave better performance.