目的 改善碳纳米管的分散性能，提高A4钢涂层的抗腐蚀性能。方法 用化学改性和物理改性相结合的办法，对多壁碳纳米管进行了功能化处理，并通过傅里叶红外光谱仪（FTIR）、透射电镜（TEM）、热重分析仪（TGA）对功能化碳纳米管进行相关表征。将改性后的碳纳米管植入陶瓷涂层中，制得不同碳纳米管含量的增强陶瓷涂层（CRPCC），并通过电化学试验深入探讨了碳纳米管增强陶瓷涂层的耐腐蚀性能。结果 处理后的多壁碳纳米管分布更均匀，缠结现象显著改善。功能化后的碳纳米管表面成功引入表面活性剂，侧壁的含氧基团占比20%左右。电化学试验表明，碳纳米管的植入有效降低了基体涂层结合处因腐蚀产生的Cl、O元素的含量，且腐蚀后CRPCC与基体的界面形貌良好。腐蚀后期，阻抗模值高达106 kΩ?cm2，防护效率高达94%。结论 对碳纳米管进行混合改性有助于提高其分散性，向涂层中植入碳纳米管，可以提高涂层的抗腐蚀性能。

The work aims to improve the dispersibility of carbon nanotubes (CNTs) and the anti-corrosion capability of A4 steel coatings. CNTs were modified by the chemical and physical treatment. The corresponding performance of modified CNTs was characterized by FTIR, TEM and TGA. Then the modified CNTs were added in the ceramic coating to prepare the CNTs-reinforced phosphate ceramic coatings (CRPCC) with the varying amounts of modified CNTs. The corrosion resistance of CRPCC was investigated by electrochemical test. The modified multiwalled CNTs were distributed more uniformly and the agglomeration was more obvious. The surface of modified CNTs was covered with active agent successfully and the oxy-gen-containing groups in the sidewall accounted for about 20wt.%. From the electrochemical results, the content of Cl, O elements at the junction between the substrate and coating could be effectively reduced by the CNTs and topography of CRPCC substrate after corrosion was good. At the later corrosion, the impedance modulus reached 106 kΩ?cm2 and PE was up to 94%. The dispersibility of CNTs can be improved by the mixed modification. The addition of CNTs can improve the corrosion resistance of coatings.