聚苯胺/膨胀蛭石粉改性水性环氧树脂防腐涂层的制备和性能*

doi:10.11901/1005.3093.2015.12.904

材料研究学报

2015, Vol. 29

Issue (12): 904-912 DOI: 10.11901/1005.3093.2015.12.904

本期目录 | 过刊浏览

聚苯胺/膨胀蛭石粉改性水性环氧树脂防腐涂层的制备和性能*

王娜^1,²(

),胡立冬¹,孙淼¹,张静¹,吴航³,王福会³

1. 沈阳化工大学材料科学与工程学院沈阳 110142
2. 哈尔滨工程大学材料科学与化学工程学院哈尔滨 150001
3. 中国科学院金属研究所沈阳 110016

Preparation and Anticorrosion Performance of Polyaniline/Vermiculite Modified Waterborne Epoxy Coatings

Na WANG^1,^2,^**(

),Lidong HU¹,Miao SUN¹,Jing ZHANG¹,Hang WU³,Fuhui WANG³

1. School of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
2. School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
3. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

王娜,胡立冬,孙淼,张静,吴航,王福会. 聚苯胺/膨胀蛭石粉改性水性环氧树脂防腐涂层的制备和性能*[J]. 材料研究学报, 2015, 29(12): 904-912.
Na WANG, Lidong HU, Miao SUN, Jing ZHANG, Hang WU, Fuhui WANG. Preparation and Anticorrosion Performance of Polyaniline/Vermiculite Modified Waterborne Epoxy Coatings[J]. Chinese Journal of Materials Research, 2015, 29(12): 904-912.

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摘要:

以聚苯胺(PANI)改性膨胀蛭石粉(VMT)为防腐填料制备水性环氧树脂防腐涂层, 用红外光谱分析仪(IR)对防腐填料的化学组成进行表征, 用热失重分析仪(TG)测试防腐填料的耐热性能, 用电化学阻抗谱分析(EIS)和盐雾实验考察了不同质量分数的PANI/VMT防腐填料对水性环氧树脂涂层防腐性能的影响。结果表明, 防腐填料PANI/VMT结合了聚苯胺(PANI)的阳极保护作用和膨胀蛭石粉(VMT)的屏蔽作用, 为金属基底提供了良好的耐腐蚀防护。当PANI/VMT的质量分数为0.5%时, 改性水性环氧树脂涂层的防腐效果最佳。

关键词 ：材料失效与保护, 水性环氧树脂, 聚苯胺, 膨胀蛭石粉, 防腐涂层

Abstract：

The waterborne epoxy coatings with polyaniline/vermiculite (PANI/VMT) as pigment were prepared. For the sake of identifying the functional groups of PANI/VMT, FT-IR measurement was performed. The thermal behavior of the pigments was characterized by thermal gravimetric analysis (TGA). The anticorrosion performance of waterborne epoxy coatings with different mass ratio of PANI/VMT was evaluated by electrochemical impedance spectroscopy (EIS) and salt spray test. The results show that a proper combination of the anodic protection ability of polyaniline and barrier property of vermiculite results in better performance of the PANI/VMT modified waterborne epoxy coating, for example, a coating with addition of 0.5% of PANI/VMT could provide a long-lasting anticorrosion protection for steel substrate.

Key words： materials failure and protection waterborne epoxy resin polyaniline vermiculite anticorrosion coatings

收稿日期: 2015-01-13

基金资助:* 辽宁省自然科学基金2015021016和沈阳市科技局国际合作项目F15-200-6-01资助

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https://www.cjmr.org/CN/10.11901/1005.3093.2015.12.904 或 https://www.cjmr.org/CN/Y2015/V29/I12/904

图1 PANI/VMT的红外光谱分析图

图2 PANI/VMT的热失重分析(TGA)曲线

图3 水性环氧树脂清漆涂层的电化学阻抗谱

图4 PANI/VMT质量分数为0.3%的改性水性环氧防腐涂层的电化学阻抗谱

图5 PANI/VMT质量分数为0.5%的改性水性环氧防腐涂层的电化学阻抗谱

图6 PANI/VMT质量分数为0.7%的改性水性环氧防腐涂层的电化学阻抗谱

图7 PANI/VMT质量分数为1.0%的改性水性环氧防腐涂层的电化学阻抗谱

图8 水性环氧树脂清漆涂层和VMT、PANI、PANI/VMT改性水性环氧树脂防腐涂层的低频阻抗值|Z|0.1随时间的变化曲线

表1 涂层试样的腐蚀电位和腐蚀速率

图9 水性环氧树脂和几种改性防腐涂层试样的Tafel曲线

图10 PANI/VMT改性水性环氧树脂防腐涂层的防腐机理模拟图

图11 600 h盐雾实验后涂层表面腐蚀情况照片

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