第45卷第6期 2015年6月
不工
PAINT&COATINGS INDUSTRY
Vol.45No.6 Jun.2015
聚苯胺改性环氧树脂涂料的制备及其耐腐蚀性研究简璐，谷琦琦，槐抗抗，王煦（西南石油大学材料科学与工程学院，成都610500）摘要：为了制备性能优异的环氧涂料，选择导电聚苯胺（PANI)作为防腐填料，通过正交实验筛选了涂料配方；运用交流阻抗讨论了浸泡温度、时间和CO，分压等因素对涂层电化学性能的影响。实验结果表明：筛选出的涂料配方为环氧树脂含量36.90%（质量分数，下同）、聚苯胺含量为0.37%、聚酰胺含量为29.52%、其他填料含量为33.21%时所制得的涂层附着力为1级、硬度为6H、耐冲击性为 45cm；随着浸泡时间的增加，涂层的腐蚀速率先增加后减小；浸泡温度从35℃升高到80℃时，涂层的腐蚀加剧；在7MPaCO，和1/L硫化钠条件下，涂层主要发生的是硫离子腐蚀。
关键词：聚苯胺；环氧树脂；改性；涂料；耐腐蚀性中图分类号：TQ635.2
文献标识码：A
文章编号：0253-4312(2015)06-0011-06
Preparation and AnticorrosiveProperty of Polyaniline Modified Epoxy Resin Coatings
Jian Lu,GuQiqi,HuaiKangkang,WangXu
(School of Material Science and Engineering,Southwest Petroleum University，Chengdu 610500,China) Abstract:In order to prepare epoxy coatings with high performance, a conductive polyani-linewas chosen as anticorrosive filler and coatings formulations were optimized via orthogonal experiment. Dynamic potential polarization curves and electrochemical impedance techniques were adopted to discuss the effects of immersion temperature, immersion time and carbon diox-idepressure, etc. on the electrochemical properties of the film. Experimental results showed that the optimized formulation of epoxy coatings comprised epoxy coatings 36.90wt.%, polyan-iline 0.37wt.%,polyamide 29.52wt.%, and other fillers 33.21wt.%.The cured film showed the adhesion 1 grade, hardness 6H and impact resistance 41 cm. With the increase of immer-sion time, the corrosion rate of the film firstly increased and then decreased. In addition, the immersion temperature rising from 35 to 80 C could result in a faster corrosion rate. At the presence of 1 g/L sodium sulfide and carbon dioxide with 7 Mpa, the sulfide corrosion on sur-face of the coated sample occurred primarily.
KeyWords:polyaniline;epoxyresin;modification;coatings;anticorrosion
环氧树脂具有优异的耐碱性、抗渗透性、附着力和机械性能，成为防腐涂料中应用最广泛的树脂之一。但是单纯的环氧树脂也存在一些不足，易老化使得多数环氧涂料只能用于100℃以下环境和底漆，并且环氧树脂柔韧性、耐酸性差，固化应力大，通常需对
环氧树脂进行改性后再使用(1-2)。自从文献报道了在不锈钢上电化学聚合的聚苯胺膜具有钝化作用这一特点，相关领域开展了大量的聚苯胺运用于防腐蚀领域的研究，特别是在防腐蚀涂料方面[3-5]。目前对于聚苯胺防腐涂料的研究主要集中在聚苯胺电化学
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