【摘要】 采用原位聚合,在400目的SiO₂表面包覆了聚苯胺（PANI）,制备了PANI/SiO₂颗粒,将其添加在环氧防腐涂层中.分别使用酚醛胺T-31、腰果酚以及聚酰胺650作为固化剂固化环氧涂层.采用扫描电子显微镜发现,聚酰胺650固化的环氧涂层结构致密,腰果酚固化的环氧涂层次之,而酚醛胺T-31固化的环氧涂层表面有明显的微孔.环氧涂层的结构对其力学性能和防腐性能有至关重要的影响.在力学性能测试中,聚酰胺650固化的环氧涂层附着力、耐磨性和硬度均比较好.电化学测试结果表明,使用聚酰胺650固化的环氧涂层防腐性能最佳,腐蚀电位E_corr为-0.567 V,腐蚀电流密度I_corr为1.890×10^-8 A/cm²;将其浸泡在3.5 wt%NaCl水溶液中,30天后依然能够发挥很好的防腐作用.更多还原

【Abstract】 By in-situ polymerization, the SiO₂ of 400 mesh was coated with polyaniline（PANI） to prepare PANI/SiO₂ particles.The T-31,cardanol and polyamide 650 were used to curing epoxy resin.The SEM results indicated that the epoxy coating cured by polyamide 650 has a compact structure, followed by the epoxy coating cured by cardanol, while the epoxy coating cured by T-31 has obvious micropores on the coating surface.The structure of epoxy coating has a vital influence on its mechanical and anti-corrosion properties.The results of mechanical performance tests show that the epoxy coating cured by polyamide 650 has the best adhesion, wear resistance and hardness; The results of electrochemical tests show that the epoxy coating cured by polyamide 650 has the best anti-corrosion properties.The corrosion potential E_corr is-0.567 V,and the corrosion current density I_corr is 1.890×10^-8 A/cm².The epoxy coating cured by polyamide 650 still has a good anti-corrosion effect when it is immersed in 3.5 wt% NaCl aqueous solution after 30 days.更多还原