模拟青铜文物粉状锈表面的超疏水制备及表征

发布时间：2018-04-26 17:42

本文选题：粉状锈 + 青铜　；参考：《表面技术》2017年02期

【摘要】：目的粉状锈会严重危害青铜文物,研究青铜文物粉状锈表面性质对建立合理有效的防护方法具有重要的意义。方法通过自组装技术,在染有粉状锈的青铜试片表面制备3-巯基丙基三甲氧基硅烷和正辛基三乙氧基硅烷复合膜。采用傅里叶变换红外光谱、扫描电镜和接触角测量仪,对复合膜表面的形貌特征和结构特点进行了表征和分析,利用电化学测试研究试片的耐腐蚀性能。结果红外光谱及扫描电镜显示,在试片的粉状锈表面形成了良好的硅烷复合膜。经自组装后的试片表面具有超疏水性,接触角从86.3°提高到155.2°。水滴与试片表面的接触面中约91.3%是液/气界面,只有较少一部分液体与试片接触。自组装后,试片的耐腐蚀性显著提升,试片的自腐蚀电流密度Jcorr由2.58×10 2 m A/cm2降低到1.081×10 2 m A/cm2,缓蚀效率为95.81%。结论硅烷复合膜可以在试片的粉状锈表面形成一层保护膜,有效地隔绝试片与液体的接触,使其具有超疏水性,同时提高其耐腐蚀性。
[Abstract]:Objective to study the surface properties of powdery rust on bronze relics is of great significance to establish reasonable and effective protection methods. Methods the composite films of 3-mercaptopropyltrimethoxysilane and n-octyl triethoxysilane were prepared on the surface of bronze coated with powdered rust by self-assembly technique. Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and contact angle measuring instrument were used to characterize and analyze the surface morphology and structure of the composite film. The corrosion resistance of the film was studied by electrochemical test. Results IR and SEM showed that a good silane composite film was formed on the surface of powdery rust. The surface of the specimen was superhydrophobic and the contact angle was increased from 86.3 掳to 155.2 掳. About 91.3% of the contact surface between water droplet and the surface of the test piece is the interface of liquid / gas, but only a small part of the liquid is in contact with the specimen. After self-assembly, the corrosion resistance of the specimens was significantly improved. The corrosion current density (Jcorr) of the specimens decreased from 2.58 脳 10 ~ (-2) m A/cm2 to 1.081 脳 10 ~ (2) Ma / cm ~ (2), and the corrosion inhibition efficiency was 95.81%. Conclusion Silane composite film can form a protective film on the surface of powdery rust of the test piece, which can effectively isolate the contact between the sample and the liquid, make it super hydrophobic and improve its corrosion resistance.
【作者单位】：华东理工大学资源与环境工程学院;上海博物馆馆藏文物保存环境国家文物局重点科研基地;
【基金】：学生创新创业训练计划项目(x14088) 上海市科委科研计划重点支撑项目(13231203000)~~
【分类号】：K876.41;TG174.4

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