A series of high solid content (30 wt%) epoxy resin (EP) composite coatings reinforced with differently sized cubic boron nitride (CBN) particles were fabricated successfully on 304L stainless steel. Polydopamine (PDA) was used to improve the dispersibility of CBN particles in EP. The structural and morphological features of the CBN particles and the composite coatings were characterized by Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Moreover, a UMT-3 tribometer and surface profiler were used to investigate the tribological behaviors of the as-prepared composite coatings. Electrochemical impedance spectroscopy (EIS) and Tafel analysis were used to investigate the coatings’ anti-corrosion performance. The results demonstrated that the CBN fillers could effectively enhance the tribological and anti-corrosion properties of the EP composite coatings. In addition, when the additive proportion of the microsized (5 μm) and nanosized (550 nm) CBN particles was 1:1, the tribological property of the EP composite coatings was optimal for dry sliding, which was attributed to the load carrying capability of the microsized CBN particles and the toughening effect of the nanosized CBN particles. However, when the additive proportion of the microsized and nanosized CBN particles was 2:1, the tribology and corrosion resistance performance were optimal in seawater conditions. We ascribed this to the load-carrying capacity of the microparticles, which played a more important role under the seawater lubrication condition, and the more compact structure, which improved the electrolyte barrier ability for the composite coatings.

在304L不锈钢上成功制造了一系列用不同尺寸的立方氮化硼（CBN）颗粒增强的高固含量（30 wt％）环氧树脂（EP）复合涂料。聚多巴胺（PDA）用于改善CBN颗粒在EP中的分散性。通过拉曼光谱，扫描电子显微镜（SEM）和透射电子显微镜（TEM）对CBN颗粒和复合涂层的结构和形态特征进行了表征。此外，使用UMT-3摩擦计和表面轮廓仪研究了所制备复合涂层的摩擦学行为。用电化学阻抗谱（EIS）和Tafel分析来研究涂层的防腐性能。结果表明，CBN填料可有效增强EP复合涂层的摩擦学性能和抗腐蚀性能。此外，当微米级（5μm）和纳米级（550 nm）CBN颗粒的添加比例为1：1时，EP复合涂层的摩擦学性能对于干滑是最佳的，这归因于其的承载能力。微米级的CBN颗粒和纳米级CBN颗粒的增韧作用。但是，当微米级和纳米级CBN颗粒的添加比例为2：1时，在海水条件下的摩擦学性能和耐腐蚀性能最佳。我们将其归因于微粒的承载能力，这些微粒在海水润滑条件下起着更重要的作用，并且结构更加紧凑，