聚苯胺-Mn3O4复合物的制备及其防腐性能研究

石油炼制与化工 ›› 2012, Vol. 43 ›› Issue (1): 84-88.

聚苯胺-Mn3O4复合物的制备及其防腐性能研究

郭磊^1,2,雷良才¹,李海英¹,韩向艳¹

1. 辽宁石油化工大学化学与材料科学学院，辽宁抚顺 113001
2. 钢铁研究总院青岛海洋腐蚀研究所

收稿日期:2011-05-16 修回日期:2011-08-01 出版日期:2012-01-12 发布日期:2011-12-28
通讯作者: 雷良才 E-mail:polymer@lnpu.edu.cn

PREPARATION OF POLYANILINE-Mn3O4 COMPOSITE AND STUDY ON ITS CORROSION PROTECTION PERFORMANCE

Received:2011-05-16 Revised:2011-08-01 Online:2012-01-12 Published:2011-12-28

摘要/Abstract

摘要： 在Mn3O4纳米粒子存在的情况下，以苯胺为原料，以过硫酸铵为氧化剂，用化学氧化法合成聚苯胺（PANI）与Mn3O4的复合物（PMC），并经氨水去杂得到本征态的PMC。用XRD、IR对产物进行表征。将涂有含PANI和PMC漆的钢试样浸泡于3.5% NaCl溶液和1.0 mol/L 盐酸溶液中，通过漆膜的开路电位和塔菲尔曲线来评价漆膜的防腐性能。结果表明：Mn3O4纳米粒子与PANI之间存在强烈的相互作用；Mn3O4对PMC中PANI分子链的结晶产生影响；含PMC漆膜试样的抗腐蚀能力比含PANI漆膜试样的强，腐蚀电流最小，而清漆试样的腐蚀电流最大。

Abstract: Composite of polyaniline (PANI)-Mn3O4 (PMC) was prepared by chemical oxidative method using aniline as raw material and ammonium persulfate as oxidant in the presence of Mn3O4 nano-particles. Undoped PMC and undoped PANI were prepared by mixing with ammonia solution to remove impurities. The prepared polymers were characterized by XRD and IR techniques. To study the corrosion protection performance of the prepared polymers, PANI and PMC was coated on steel strip respectively, and the coated strips were immersed in 3.5% NaCl solution and 1.0 mol/L HCl solution respectively. Then open circuit potential and polarization curve measurements of the coatings were carried out to compare their corrosion protection performance. Results indicate that strong interactions of Mn3O4 particles and PANI exist, and the crystallization of PANI molecular chain is affected by Mn3O4 particles as well. The corrosion protection properties of coatings containing PANI and PMC are better than that of varnish, the corrosion current (icorr) of coating containing PMC is the smallest, and thus its corrosion protection performance is the best.

郭磊雷良才李海英韩向艳. 聚苯胺-Mn3O4复合物的制备及其防腐性能研究[J]. 石油炼制与化工, 2012, 43(1): 84-88.