目的 研究蒙脱土-聚吡咯(MMT-PPy)改性环氧树脂涂层的防腐性能。方法 通过氧化合成法制备PPy，采用插层法制备不同吡咯(Py)含量的MMT-PPy粉末。然后分别制备MMT-PPy/EP涂层、不同Py含量的MMT-PPy复合材料涂层和掺杂不同MMT-PPy含量的复合材料涂层。利用XRD、接触角测量仪、电化学工作站等对涂层的微观形貌、结构成分、疏水性能、耐蚀性等进行观察与分析。结果 SEM测试观察到，MMT层间距离明显变大，片层间有胞状的PPy颗粒，形貌更加致密，表明PPy成功地插层到了MMT中。FT-IR测试表明，特征峰左移，PPy与MMT之间发生聚合。XRD测试表明，PPy成功地插层到MMT的层间，并且MMT的层间距由1.241 nm扩大到1.838 nm。接触角与粗糙度测试表明，MMT-PPy/EP涂层的接触角为84.3°，疏水性能好。电化学极化曲线测试表明，MMT-PPy/EP涂层的腐蚀电位最大，为?0.661 V，腐蚀电流密度最小，为1.801×10^?8 A/cm²，保护率达到99.28 %，其腐蚀速率最低。电化学阻抗谱测试表明，MMT-PPy/EP涂层比其他涂层具有更大的阻抗弧，在高频区域相位角最大，低频区域阻抗模值最大，说明其防腐性能最好。在改变Py含量对制成的MMT-PPy粉末防腐性能的影响中，m(Py)∶m(MMT)=3∶1粉末的阻抗弧最大，将(m(Py)∶m(MMT)=3∶1)的MMT-PPy粉末以5%的添加量加入到环氧树脂中，涂层的阻抗弧最大，其防腐性能最好。结论 当MMT-PPy复合材料的添加量为5%时，m(Py)∶m(MMT)=3∶1时，复合材料环氧树脂涂层的防腐效果最好。

This paper aims to study the anti-corrosion performance of montmorillonite-polypyrrole (MMT-PPy) modified epoxy resin coating. PPy is prepared by oxidation synthesis method, MMT-PPy powder with different Py content is prepared by intercalation method, EP, PPy/EP, MMT/EP, MMT-PPy/EP coating samples are prepared by knife coating method, and samples prepared with different Py content MMT-PPy composite coating and doped MMT-PPy composite coating with different mass fractions, using SEM, FT-IR, XRD, 3D profile scanner, contact angle measuring instrument, electrochemical workstation to observe and analyze the micro morphology of the coating, structural components, hydrophobic properties, corrosion resistance, etc. The results show that the distance between the MMT layers became significantly larger, and there are cellular PPy particles between the layers, and the morphology is more dense, indicating that the PPy is successfully intercalated into the MMT, which can make the MMT-PPy coating more continuous; the left shift of the characteristic peak in the FT-IR test indicates that the polymerization between PPy and MMT occurs; from XRD, it is found that PPy is successfully intercalated to the interlayer of MMT, and the interlayer spacing of MMT is expanded from 1.241 nm to 1.838 nm; through the contact angle and roughness test, the contact angle CA of the MMT-PPy/EP coating is 84.3°, and the hydrophobic performance is better; in the electrochemical polarization curve analysis, the corrosion potential of the MMT-PPy/EP coating is the largest, which is ?0.661 V, the minimum corrosion current is 1.801×10?8 A/cm2, and the protection rate reaches 99.28%, indicating the lowest corrosion rate; electrochemical impedance spectroscopy analysis shows that MMT-PPy/EP coating is better than other coatings. It has a larger impedance arc, the phase angle is the largest in the high-frequency region, and the impedance modulus value is the largest in the low-frequency region, indicating that its corrosion resistance is better. In the influence of changing the Py content on the corrosion resistance of the MMT-PPy powder made, the impedance arc of m(Py)∶m(MMT)=3∶1 is the largest, and the MMT-PPy powder prepared by doping 5wt.% m(Py)∶m(MMT)=3∶1 is added to Among epoxy resins, the coating has the largest arc resistance and the best corrosion resistance. According to the above results, when the addition amount of MMT-PPy composite is 5wt.% and the ratio of m(Py)∶m(MMT) is 3∶1, the anticorrosion effect of composite epoxy resin coating is the best.