Seeking high-performance coating with long service life to protect metallic substrates under complex corrosion environment has attracted abundant attention in modern industry. In this work, poly(arylene ether nitrile) (PEN) was applied as protective coating on metallic substrates for the first time, and the cyano- functionalized multiwalled carbon nanotubes (MWCNTs-CN) was introduced to further enhance the corrosion resistance and mechanical performance of the PEN coating. Electrochemical results demonstrated that the MWCNTs-CN incorporated composite coating possessed outstanding corrosion resistance that the |Z|_0.01Hz remained 196.9 MΩ cm² after 100 days' immersion process in 3.5 wt% NaCl solution, which was 2 orders of magnitude higher than the pure PEN coating. Besides, an evident improvement was investigated from the tensile strength of MWCNTs-CN/PEN coatings, which showed an increment about 20.1% of tensile strength was gained when 1 wt% of MWCNTs-CN was introduced. Benefiting from these advantages, this work is expected to provide a novel insight in high-performance protective coating.

寻求具有长使用寿命的高性能涂层来保护复杂腐蚀环境下的金属基材已引起现代工业的广泛关注。本工作首次将聚亚芳基醚腈（PEN）作为金属基材的保护涂层，并引入氰基功能化多壁碳纳米管（MWCNTs-CN）以进一步提高耐腐蚀性和机械性能PEN 涂层。电化学结果表明，MWCNTs-CN复合涂层具有优异的耐腐蚀性，|Z| _0.01Hz保持 196.9 MΩ cm ²在 3.5 wt% NaCl 溶液中浸泡 100 天后，比纯 PEN 涂层高 2 个数量级。此外，研究了 MWCNTs-CN/PEN 涂层的拉伸强度有明显改善，表明当 1 wt% 的 MWCNTs-CN 加入时，拉伸强度增加了约 20.1%。受益于这些优势，这项工作有望为高性能保护涂层提供新的见解。