A boron nitride nanoplates (BNNPs) reinforced aluminium alloy (Al7079) based ex-situ metal matrix (MM) nano-composite was successfully developed via mechanical stir casting process. This MM nano-composite shows better wetting and anti-corrosion properties in comparision of bare Al7079 alloy. To further enhance the aforementioned properties, two dissimilar hard coatings (TiN & h-BN) with hierarchal rough surfaces were employed on the BNNPs functionalized MM composite surface via a single-step PVD technique, which provide a tough barrier with non-wetting surface to prevent the base material from corrosion attack. The addition of these layers led to a significant change in physical, chemical, mechanical and anti-corrosion properties. The results also revealed the hydrophobicity of developed coatings with optical contact angle meter of TiNNCs and h-BNNPs surfaces ~102.1° and 141.6°, respectively. The collective results obtained from electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization tests revealed the one order higher corrosion resistance of h-BN coated sample than TiN coated sample under saline media (3.5 wt%). This coating may be a promising candidate in various applications, where the protection of materials against corrosion is necessary.

通过机械搅拌铸造工艺成功开发了一种基于异位金属基体（MM）的氮化硼纳米板（BNNPs）增强铝合金（Al7079）纳米复合材料。与裸Al7079合金相比，这种MM纳米复合材料表现出更好的润湿和防腐性能。为了进一步增强上述性能，通过单步 PVD ​​技术在 BNNPs 功能化 MM 复合材料表面上使用了两种具有分级粗糙表面的不同硬涂层（TiN 和 h-BN），这提供了具有非润湿表面的坚韧屏障防止基材腐蚀。这些层的添加导致物理、化学、机械和防腐性能的显着变化。结果还揭示了疏水性使用 TiNNCs 和 h-BNNPs 表面的光学接触角计开发的涂层分别约为 102.1° 和 141.6°。从电化学阻抗谱(EIS) 和动电位极化测试获得的集体结果表明，在盐水介质 (3.5 wt%) 下，h-BN 涂层样品的耐腐蚀性比 TiN 涂层样品高一个数量级。在需要保护材料免受腐蚀的各种应用中，这种涂层可能是一种很有前途的候选者。