装载缓蚀剂的纳米SiO<sub>2</sub>对环氧涂层耐腐蚀性的影响

doi:10.11902/1005.4537.2014.226

中国腐蚀与防护学报

2015, Vol. 35

Issue (5): 447-454 DOI: 10.11902/1005.4537.2014.226

本期目录 | 过刊浏览

装载缓蚀剂的纳米SiO₂对环氧涂层耐腐蚀性的影响

孙伟¹,尹桂来²,刘福春¹(

),唐囡²,韩恩厚¹,万军彪²,柯伟¹,邓静伟²

2. 国网江西省电力科学研究院南昌 330096

Influence of Corrosion Inhibitor Carriered Nano-SiO₂ on Corrosion Resistance of Epoxy Coating

Wei SUN¹,Guilai YIN²,Fuchun LIU¹(

),Nan TANG²,En-Hou HAN¹,Junbiao WAN²,Wei KE¹,Jingwei DENG²

1. Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2. State Grid Jiangxi Electric Power Research Institute, Nanchang 330096, China

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摘要:

以SiO₂作为载体,将缓蚀剂8-羟基喹啉在纳米SiO₂中进行负载,负载后的粉体采用红外光谱和紫外吸收光谱进行表征。将装载后的纳米SiO₂粉体加入到环氧涂料中,制备出含装载缓释剂8-羟基喹啉的纳米SiO₂的环氧树脂涂层,通过盐雾实验和电化学阻抗谱实验测试其对环氧涂层耐蚀性的影响。结果表明,缓蚀剂8-羟基喹啉成功装载到SiO₂孔道中,纳米SiO₂装载缓释剂8-羟基喹啉提高了环氧涂层的耐蚀性,其中添加5% (质量分数) SiO₂装载缓蚀剂8-羟基喹啉粉体的环氧涂层耐蚀性最高,原因是缓蚀剂8-羟基喹啉从SiO₂孔道中释放到涂层并渗透到基体表面,对基体起到缓蚀作用,提高了涂层的耐腐蚀性能。

关键词 ： 8-羟基喹啉, 纳米SiO₂, 环氧涂层, 输变电设备, 防腐蚀材料

Abstract：

The 8-hydroxyquinoline (8Q), as a sustained-release corrosion inhibitor was deposited onto nano-particles of mesoporous-silica to prepare 8-hydroxyquinoline-silica (8Q-SiO₂) powder. Then the powder was used as pigment to modify epoxy resin to prepare 8Q-SiO₂-epoxy resin coating. The prepared 8Q-SiO₂was characterized by means of infrared spectrum and ultraviolet absorption spectrum. The corrosion performance of the 8Q-SiO₂-epoxy resin coating was examined by salt spray test and electrochemical impedance measurement. The results revealed that the 8Q can enhance the corrosion resistance of epoxy coating, and among others the epoxy coating with 5% (mass fraction) 8Q-SiO₂ exhibits the highest corrosion resistance, which may be ascribed to that the 8Q may slowly release from the mesoscopic channels within SiO₂ into the epoxy coating and then arrive at the interface coating/substrate to provide corrosion inhibition for the substrate.

Key words： 8-hydroxy quinoline nano-silica epoxy coating electric transmission and transformation equipment anticorrosive material

ZTFLH:

基金资助:国家电网公司科技项目(521820130014),国家重点基础研究发展计划项目 (2014CB643304) 和广东省中国电器院风电装备腐蚀控制关键技术院士工作站项目 (2013B090400023) 资助

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	孙伟
	尹桂来
	刘福春
	唐囡
	韩恩厚
	万军彪
	柯伟
	邓静伟
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引用本文:

孙伟, 尹桂来, 刘福春, 唐囡, 韩恩厚, 万军彪, 柯伟, 邓静伟. 装载缓蚀剂的纳米SiO₂对环氧涂层耐腐蚀性的影响[J]. 中国腐蚀与防护学报, 2015, 35(5): 447-454.
Wei SUN, Guilai YIN, Fuchun LIU, Nan TANG, En-Hou HAN, Junbiao WAN, Wei KE, Jingwei DENG. Influence of Corrosion Inhibitor Carriered Nano-SiO₂ on Corrosion Resistance of Epoxy Coating. Journal of Chinese Society for Corrosion and protection, 2015, 35(5): 447-454.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2014.226 或 https://www.jcscp.org/CN/Y2015/V35/I5/447

图1 SiO2, 8Q和8Q-SiO2的红外光谱

图2 SiO2和8Q-SiO2的热重曲线

图3 8Q-SiO2和纳米SiO2的N2吸附-脱附等温线

表1 吸附材料的物理性质

图4 8Q和8Q-SiO2的紫外吸收曲线

表2 Z0, Z1, Z3和Z5 4种涂层的拉开法附着力测试结果

图5 涂层试样盐雾实验2000 h后的表面形貌

表3 盐雾实验2000 h后涂层试样的腐蚀情况

图6 盐雾实验2000 h后涂层试样划痕横截面部位的SEM像

图7 盐雾实验后涂层试样划痕部位的锈蚀产物EDX结果

图8 不同8Q-SiO2含量的涂层试样在不同浸泡时间的Bode图

图9 等效电路图

图10 涂层电阻随浸泡时间的变化

图11 涂层吸水率随浸泡时间的变化

图12 8Q在纳米SiO2粉体中的释放机理

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