Diamond-like carbon (DLC) films are among attractive options to increase wear and corrosion resistance. However, nano-cracks in the DLC films as well as insufficient adhesion to the steel substrates limit their use as a protective layer. In this work, the electroless Nickel-phosphorus (NiP) and NiP-SiC nanocomposite interlayers were used as a bond coat between steel substrate and DLC film, which can also act as corrosion-resistant barrier layer. The DLC film was deposited by the radio frequency plasma enhanced chemical vapor deposition method using acetylene as a precursor. The carbon atomic bonds of the coating have been analyzed by Raman spectroscopy. The corrosion behavior of the samples was investigated by potentiodynamic and electrochemical impedance spectroscopy methods and the surface of the specimens was examined by field emission scanning electron microscopy after the corrosion tests. The results show that applying NiP and NiP-SiC nanocomposite interlayer increased the corrosion resistance of the bilayer specimens.

类金刚石碳 (DLC) 薄膜是增加耐磨性和耐腐蚀性的有吸引力的选择之一。然而，DLC 薄膜中的纳米裂纹以及对钢基材的附着力不足限制了它们作为保护层的使用。在这项工作中，化学镀镍磷 (NiP) 和 NiP-SiC 纳米复合夹层用作钢基材和 DLC 膜之间的粘合层，也可以作为耐腐蚀阻挡层。DLC 薄膜是通过射频等离子体增强化学气相沉积方法沉积的，使用乙炔作为前驱体。通过拉曼光谱分析了涂层的碳原子键。通过动电位和电化学阻抗谱方法研究了试样的腐蚀行为，腐蚀试验后用场发射扫描电子显微镜检查了试样表面。结果表明，应用NiP和NiP-SiC纳米复合夹层提高了双层试样的耐腐蚀性能。