基于磁过滤技术制备亚微米级TiAlN/TiAlCN/TiAlC复合涂层的耐腐蚀性能

To improve the anti-corrosion capacity of long-term service ships and aircraft in extremely harsh marine environments, a filtered cathodic vacuum arc (FCVA) method was used to prepare submicron multilayer-structured coating (TANC) with different Al/Ti contents. SEM, XRD, electrochemical and salt spray tests were selected to analyze the morphology, structure and anti-corrosion properties of the films, respectively. The results show that pitting corrosion mainly occurs on the coating surface in the salt spray test. The anticorrosion capacity of the coating was improved with the increase of Al/Ti content. The corrosion current I_corr of the submicron coating can reach the order of 10^-7 A/cm², the I_corr decreases from 7.7291×10^-7 to 3.8347×10^-7 A/cm², and the impedance value in the low frequency region increased from 1.19×10⁵ to 4.70×10⁵ Ω•cm², which is two orders of magnitude higher than the substrate. The strong anti-corrosion effect of submicron TANC coating with high Al content can be achieved by FCVA, which has the potential to develop corrosion resistant coatings.