聚苯胺-蒙脱土纳米复合材料的耐腐蚀性能

CORROSION RESISTANCE OF POLYANILINE/MONMORILLONITE NANOCOMPOSITE MATERIAL

在聚合温度为25℃,蒙脱土质量含量为苯胺的0.5%,过硫酸铵和苯胺的摩尔比为1∶1,掺杂剂磺基水杨酸摩尔浓度为0.03mol/L的实验条件下,运用插层聚合的方法制备出PAn MMT复合纳米材料。电化学阻抗谱(EIS)表明:在NaCl质量含量为3.5%的腐蚀环境中,该复合纳米材料作为冷轧钢的涂层,耐蚀效果并不理想;与环氧树脂面涂料配合使用,耐蚀效果明显提高;在盐酸摩尔浓度为1mol/L的腐蚀环境中,沥青涂料是比环氧树脂更好的面涂料。浸泡试验表明:在上述两种腐蚀环境中,以聚苯胺蒙脱土复合材料作为冷轧钢的底涂料,沥青涂料作为面涂料,45天后没有发现腐蚀现象。

Under the experimental conditions of polymerization temperature at 25℃, n(APS)/n(An) of 1∶1, c(SSA) of 0.03mol/L, the nanocomposite of polyaniline/monmorillonite(PAn-MMT) was prepared by intercalative polymerization. The results of EIS indicated that the corrosion resistance of the composite as a cold-rolled steel coating was unsatisfactory in the corrosion environment of 3.5%NaCl. The corrosion resistance was improved obviously when it was used together with epoxy resin. In the solution of 1.0mol/L HCl, the pitch paint as outside coating was better than epoxy resin. The immersion tests showed that in the two corrosion environments mentioned aboved, there was no any corrosion after 45 days when PAn-MMT nanocomposite material was as the substrate coating and the pitch paint as outside coating.