Abstract: ［Objective］ To address the insufficient long-term protective performance of waterborne anticorrosive coatings，composite fillers with excellent dispersibility and dual shielding-passivation anticorrosive capabilities were prepared. This study aimed to clarify the effects of keypreparation and formulation parameters on coating performance，thereby providing support for the development of high-performance waterborne anticorrosive coatings.［Methods］Polyaniline-mica iron oxide（PANI-MIO）composite fillers were prepared via in-situ polymerization of aniline（ANI）to form polyaniline（PANI） on the surface of mica iron oxide（MIO）. Their successful preparation was characterized by FT-IR and SEM. The fillers were dispersed in waterborne epoxy resin to form coatings，and the effects of the ANI/MIO feeding ratio and filler content on the dispersibility of PANI-MIO，as well as the mechanical and anticorrosive properties of the coatings，were systematicallyinvestigated.［Results］ PANI-MIO with different ANI/MIO feeding ratios maintained uniform dispersion in the coatings，but agglomeration occurred when the filler content was ≥15%. PANI-MIOslightly improved the coating hardness without affecting its impact resistance and cross-cut adhesion.The coating exhibited optimal anticorrosive performance when the ANI/MIO feeding ratio was 0. 1∶1 and the filler content was 15%. After immersion in 3. 5%NaCl solution for 40 days，its |Z|_{0. 1 Hz} remained above 10⁹ Ω·cm²，the intact coating showed non-corrosion after 3 000 h in the neutral salt spray test， and only slight local corrosion appeared at the scratch after 720 h in the scratch salt spray test. Incontrast，the |Z|_{0. 1 Hz} of the pure resin coating decreased to 10^{7. 5} Ω ·cm² in the same period，with blistering and pitting occurring after 600 h in the salt spray test，and obvious corrosion diffusion at the scratch after 240 h.［Conclusion］The PANI-MIO composite filler enhances anticorrosive performance through the synergistic effect of“MIO shielding + PANI passivation”. The optimal combination is an ANI/MIO feeding ratio of 0. 1∶1 and a filler content of 15%. This filler can balance the dispersionstability of the coating and its comprehensive mechanical-anticorrosive performance，providing afeasible solution for the upgrading of waterborne coatings in the industrial heavy anticorrosive field.

Key words: polyaniline；mica iron oxide（MIO）；in-situ polymerization；waterborne；corrosion resistance coating 

摘要： 【目的】针对水性防腐涂料长效防护性不足的问题，制备了一种兼具优异分散性与双重屏蔽 -钝化防腐能力的复合填料，明确关键制备比例及配方参数对涂层性能的影响，为高性能水性防腐涂料开发提供支撑。【方法】采用原位聚合法在云母氧化铁（ MIO）表面生长聚苯胺（ PANI），制得 PANI-MIO复合填料；通过 FT-IR和 SEM表征其制备效果，将其分散于水性环氧树脂中构筑长效防腐涂层，系统探究了 ANI（苯胺） /MIO投料比以及填料添加量对 PANI-MIO分散性、涂层基础性能及防腐性能的影响。【结果】不同 ANI/MIO投料比的 PANI-MIO在涂层中均保持均匀分散，但添加量 ≥15%时出现团聚； PANI-MIO可小幅提升涂层硬度，且不影响耐冲击性与划格附着力。当 ANI/MIO投料比 0. 1∶1、添加量为 15%时，涂层防腐性能最优， 3. 5%NaCl溶液浸泡 40 d后|Z|_{0. 1 Hz}仍高于 10⁹ Ω·cm²完整涂层耐中性盐雾 3 000 h无腐蚀，划痕涂层盐雾 720 h仅少量局部腐蚀；而纯树脂涂层同期 |Z|_{0. 1 Hz}降至 10^7.5 Ω·cm²，600 h盐雾即起泡点蚀， 240 h划痕涂层腐蚀扩散明显。【结论】 PANI-MIO复合填料通过 “MIO屏蔽 +PANI钝化”协同作用提升防腐性能， ANI/MIO投料比为 0. 1∶1、添加量为 15%为最优组合，该填料可兼顾涂层分散稳定性与力学 -防腐综合性能，为工业重防腐领域构建水性长效防腐涂料提供可行方案。

关键词: 聚苯胺, 云母氧化铁, 原位聚合, 水性, 防腐涂层

CLC Number: 

• TQ635. 2