摘要： 以二氧化锰代替过硫酸铵氧化苯胺单体，并在聚合反应体系中添加适当比例的二氧化硅粒子，制备出不 同酸掺杂的聚苯胺包覆二氧化硅复合粒子。扫描电子显微镜(SEM)观察表明，二氧化硅表面及其粒子之间明显包覆一层聚苯胺( PANI) ; 并比较不同酸掺杂的聚苯胺复合粒子的傅里叶变换红光谱 ( FT-IR ) ，证明了掺杂的有效性。将合成的聚苯胺复合粒子作为防腐填料，加入环氧树脂作为成膜物，制备出的聚苯胺 /环氧树脂复合涂料涂覆在碳钢 基体上，采用加速浸泡实验、开路电位法、Tafel极化曲线研究其防腐性能。实验结果表明:H₂SO₄掺杂的聚苯胺复合涂层具有优良的防腐性能，该复合涂层的腐蚀电位较环氧树脂涂层提高400 m V，腐蚀电流下降4 ~ 5 个数量级，是一种低成本、高性能防腐涂料。

关键词: 二氧化锰 , 聚苯胺 , 二氧化硅 , 防腐涂料

Abstract:  A polyaniline at the presence of different acids was prepared by using manganese dioxide in stead of the ammonium persulfate oxidant, which was used to coat silica particles by adding the proper pro-portion of silica particles during polymerization. Results of Scanning electron microscopy(SEM)showed that
PANI layer was coated on the surface of silica particles, and the fourier transform infrared spectroscopy(FTIR of different acids blended PANI composite particles showed the effectiveness of blending. Anti-corrosion coatings was prepared with the PANI composite particles as anti-corrosion filler and epoxy resin as film-forming material. The prepared polyaniline/ epoxy resin composite coatings were coated on the iron electrodes. The anti-corrosion properties of the coatings were investigated by test of accelerated immersion open circuit potential and Tafel curve. The results showed that H, $0, blended polyaniline composite coating has excellent anti-corrosion properties, its corrosion potential was higher than epoxy coatings by 400 mV and the corrosion current was reduced by 4~5 order of magnitudes. The prepared anti-corrosion coating featured by its high performance of anti-corrosion and low cost.

Key words: manganese dioxide: polyaniline: silica, anti-corrosion coating