The dispersion of hexagonal boron nitride (h-BN) in resin to prepare anti-corrosion coating has only a single physical shielding function, and does not inhibit the electrochemical reaction process, which significantly reduces the durability of anti-corrosion coating. In this paper, polyaniline with anodic passivating function was synthesized on the surface of h-BN by in-situ polymerization, and Ce cation with corrosion inhibition was loaded into polyaniline/h-BN. Thus, a triple functional anti-corrosion filler Ce&PANI/h-BN with physical shielding - anode passivation - cathode corrosion inhibition was prepared. The microstructure, crystal form, element distribution, thermal stability and corrosion inhibition ability of the composite filler were characterized. The anti-corrosion, anti-friction and adhesion properties of EP/Ce&PANI/h-BN composite coating was investigated. EIS and Tafel test results show that the corrosion inhibition efficiency of Ce&PANI/h-BN is 55.5% and 89.67%, respectively. The low-frequency impedance modulus of the composite coating after 40 days of exposure is 13 times that of the pure EP coating, up to 9.79 × 10 ·cm. The results of salt spray test also show that the barrier ability and anti-corrosion effect of the composite coating are significantly improved compared with the pure EP coating. The wear mass loss of the composite coating is reduced by 43.69% compared with the pure EP coating. This research provides a way to prepare multi-functional, high shielding, wear resistance anti-corrosion fillers to achieve long-term protection of coatings.

中文翻译：

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H-BN基三功能填料增强环氧涂层的防腐性能

将六方氮化硼（h-BN）分散在树脂中制备防腐涂层仅具有单一的物理屏蔽功能，并且不抑制电化学反应过程，从而显着降低了防腐涂层的耐久性。本文通过原位聚合在h-BN表面合成了具有阳极钝化功能的聚苯胺，并将具有缓蚀作用的Ce阳离子负载到聚苯胺/h-BN中。由此制备出物理屏蔽-阳极钝化-阴极缓蚀三重功能的防腐填料Ce&PANI/h-BN。对复合填料的微观结构、晶型、元素分布、热稳定性和缓蚀能力进行了表征。研究了EP/Ce&PANI/h-BN复合涂层的防腐、减摩和附着性能。 EIS和Tafel测试结果表明Ce&PANI/h-BN的缓蚀效率分别为55.5%和89.67%。暴露40天后复合涂层的低频阻抗模量是纯EP涂层的13倍，达到9.79×10·cm。盐雾试验结果也表明，复合涂层的阻隔能力和防腐效果较纯EP涂层显着提高。复合涂层的磨损质量损失比纯EP涂层减少了43.69%。该研究提供了一种制备多功能、高屏蔽、耐磨防腐填料的方法，以实现对涂层的长期保护。