(1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China) (2. Graduate university of Chinese Academy of Sciences, Beijing 100039, China）
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Abstract:
Common metal anticorrosion coatings are generally based on zinc powder; however, mass use of zinc based coating may cause heavy metal pollution in the media, and there also exists concern for the sustainable supply of zinc resource. Conducting polymers possess reversible redox performance, which enables them to be the new anticorrosion agents, and their anticorrosion performance has attracted intense attentions since late 1980s. Among them, polyanilines are of particular interest due to their environmental stability, easy synthesis, and relatively low cost. The prominent protection performance of polyaniline has been confirmed by numerous experiments, and some anticorrosion coating products have been developed in Germany, the United States and China. The progress in basic research and practical application of polyaniline as anticorrosion material is systemically reviewed, and the unique protection mechanisms of polyaniline are discussed in detail. Analyses are also made on the existing problems in polyaniline anticorrosion materials. It is concluded that the polyanilines are expected to be the new generation of anticorrosion material with nontoxic and pollutionfree characteristics.