Polyaniline (PANI) has good electrical conductivity and unique doping-dedoping properties

and it has become a high-profile conductive polymer material in recent years. Because of its unique properties of scratch-resistant

anti-pitting and passivation

PANI has owned great application prospects in the field of metal anti-corrosion. The presence of the benzene ring in the polyaniline structure makes its molecular chains more rigid

and intermolecular hydrogen bonds lead to its insoluble

refractory

poor processing performance

which seriously hampered the application of polyaniline. The doping process can effectively improve some properties of polyaniline or give it a new function

which extends the application of polyaniline. This article reviews the doping way and the doping mechanism of polyaniline

preparation methods of polyaniline anti-corrosion material

as well as its application in the field of metal anti-corrosion

and looks forward to the research and application prospects of polyaniline.